下面是小编为大家整理的高中英语定语从句知识，本文共8篇，供大家参考借鉴，希望可以帮助到有需要的朋友。本文原稿由网友“dombee”提供。
篇1：高中英语定语从句知识
高中英语知识的学习中，定语从句是重要的内容，也是高考试题中占分数比重相对较高的题型。
一、关系代词引导的定语从句
that 指人或物在从句中作主语，宾语或表语
which 指物在从句中作主语，宾语或表语(作宾语时可以省略)
who 指人在从句中作主语，宾语或表语
whom 指人在从句中作宾语
whose 指人或物在从句中作定语
as 指人或物在从句中作主语，宾语或表语
but 指人或物在从句中作主语，宾语或表语
注意：指物时，whose+名词=the+名词+of which或 of which+the+名词
as 的用法
常用于下列结构：such…as; so…as;the same…as; as…as
注意：the same…as 表示同一类，不同一个
the same…that 表示同一个
as与which的区别
1. 位置不同
as可放在主句后，主句前或主句中间;which只能放在主句后。
2. as起连接作用，表达说话人的观点、看法，并指出主句内容的根据或出处，意为“正如，正像”。
Which相当于并列句，可以用and this来代替，意为“这一点，这件事’”。
注意：as常用于下列结构：as we know/ as is known to all, as we all can see, as has been said before/above,
as might be excepted, as is often the case, 一般不能用which代替as。
3. 在从句中作主语时，which既可作系动词be的主语也可作实义动词的主语，而as只可作系动词be的主语。
二、只用that不用which的情况
1. .先行词为 all , much, everything, nothing , something ,anything, nothing, none, the one等不定代词时
2. 先行词被only, any, few, little, no , all, just , very ,right等修饰时.
3. 当先行词是最高级或被形容词最高级修饰时。
4. 当先行词是序数词或被序数词修饰时。
5. 当先行词是数词时.
6. 当先行词既指人又指物时。
7. 如有两个定语从句，其中一个关系代词已用which，另一个关系代词则宜用 that。
8. 主句是There be结构,修饰其主语的定语从句宜用that 作关系代词。
9. 被修饰成分为表语,或者关系代词本身是定语从句的表语时，该关系代词宜用that。
10. 先行词为what，关系代词用that。
11. 有时为了避免重复而使用that引导定语从句。
三、只用which不用that的情况
1. 当介词放在关系代词之前时。
2. 在非限制性定语从句中。
3. 当关系代词指整个主句的概念时。
四、只用who不用that的情况
1.当先行词是one, ones,anyone或those时。
2. there be 结构中。
3. 当先行词是人，后面有较长修饰语时。
4. 为了避免重复或引起歧义。
5. 当先行词是I,you,he,they等时(常用于谚语中)。
6. 先行词是指成员的集体名词。
7. who可以引导非限制性定语从句。
8. 先行词是拟人化的名词。
9. 先行词指特定的人时用who,不指特定的人用that。
篇2：高中英语语法知识总结：定语从句
高中英语语法知识总结：定语从句
易错点1 关系代词与关系副词的混用
1.定语从句相当于一个形容词，起定词作用， 修饰名词或代词
2.定语从句的引导词的三种功用:( 1)引导定语从句(2)替代先行词(3)在定语从句中充当一定的成分。
3.解题要领:根据定语从句中所缺成分来确定是用关系代词还是关系副词，决不要因先行词是时间名词就用when，是地点名词就用where。
易错点2 关系代词who、whom、whose的误用
对于定语从句关系词的考查，首先要确定从句是什么类型的从句，然后再分析关系词在从句中的成分，最后选择正确的词。要求考生具有一定的句子分析能力，和理解能力。如果缺少主宾表，要用that或which，缺少状语用关系副词when，where，why，缺少定语用whose。
易错点3 关系代词that和which的误用
只用which，不能用that的情况
(1) 在介词提前到关系代词之前形成“介词+关系代词”结构来修饰表事物的先行词时， 关系代词必须用which.如：
☞The house in which we live is very large. 我们住的房子非常大。
这就是老师正在谈及的那本参考书。
注意：如果介词不放在修饰事物的限定性定语从句的句首， which就可换为that， 如：
☞This is the question which/that we’ve had so much discussion about. =This is the question about which we’ve had so much discussion. 这就是我们已经多次讨论过的问题。
(2) 先行词为“those+表事物的复数名词”时， 关系代词通常只用which而不用that。如：
☞Students should keep in mind those regulations which restrict their behavior.
学生应牢记那些规范自己的行为准则。
☞A bookshop should deal with a variety of those best sellers which are newly published.
书店应该经营新出版的各种畅销书。
(3)当先行词指物，关系词在句中作主语或宾语，引导非限制性定语从句的关系词只能用which，而不用that。
易错点4 介词后接关系代词的误用
●使用“介词+关系代词”要注意以下几点：
(一)选用介词的依据：
(1) 根据定语从句中谓语动词的搭配习惯(即固定短语)。
(2) 根据先行词的搭配习惯(约定俗成，不一定是短语)。
(3) 根据句子的意思来选择。
(4) 表示“所有”关系或“整体中的一部分”时，通常用介词of。
(二)在定语从句中，含介词的短语动词不可拆开使用(短语拆开后含义发生变化)，如look after, look for等。
(三)“of which / whom”有时可以用“whose+名词”结构来改写。
(四)当先行词为way并且定语从句中缺少状语时，通常用in which或that引导定语从句(in which或that可省略);如果定语从句中不缺少状语，则用关系代词引导(that 或which 可省略)。
(五)in that不可以引导定语从句，但可以引导原因状语从句。
二、“介词+关系代词”与关系副词的转化
(1)当先行词表示地点，定语从句中缺少地点状语时，通常用关系副词where引导，此时也可选用表示地点的介词+which来代替关系副词where。
(2) 当先行词表示时间，定语从句中缺少时间状语时，通常用关系副词when引导，此时也可选用表示时间的介词+which来代替关系副词when。
(3) 当先行词为reason，定语从句中缺少表示原因状语时，通常用关系副词why引导，此时也可以用for which来代替关系副词why。
易错点5 定语从句与同位语从句的区别
定语从句与同位语从句的区别：
1. 被修饰的词不同：同位语从句的前面一般是数量有限的、表示抽象意义的名词;而定语从句的先行词是无数的指人或物名词。
2. 从句的作用不同：同位语从句表示同位名词的具体内容，而定语从句是对先行词的限制、描绘或说明。
3. 引导词不同：what, how, whether等不能用引导定语从句，但可用于引导同位从句。
4. 引导词的作用不同：引导同位语从句的that是连词，在从句中不充当任何成分;而引导定语从句的that为关系代词，在从句中充当一定的句子成分。
5. 判定定语从句和同位语从句的方法：由于同位语从句是用以说明被修饰名词的具体内容的，所它可以转换同位名词的表语;而定语从句则不能作这种转换。
易错点6 定语从句与强调句型的区别
定语从句对名词或代词的修饰和限制，关系词可能是that, which, as, who, but, 另一方面，句子中的It有所指;而强调句型是对某部分加强语气，强调语气的连接词只能是that, who，并且句子中的It 没有任何意义;一般比较明显，而有时就难以区别，还需要根据上下文的语境来判断。
它究竟是强调句型还是定语从句，就要从语境上来考查。如果它是用来回答What is this / that? 这样的问题，意思是：它是一本他想要的书。句子显然是定语从句。如果是用来回答What does he want? 这样的问题，那么意思是：他想要的是一本书。显然，句子是强调句型。
易错点7 关系代词as和which的区别
关系代词as和which引导定语从句的不同点
1. as可以放在主句前后，也可插入主句之中;而which引导的非限制性定语从句只能位于主句之后。
2. 在非限制性定语从句中，which后的be动词不可省;而as后的be动词可以省略。
3. which在非限制性定语从句中作主语时可用各类动词作谓语;而as作主语时，谓语常用系动词，如be，seem，become等，一般不用其他行为动词。
4. as常用“正如”含义，常用的结构有as we know(众所周知);as often happens(正如常发生的那样);as is often the case(情况常常如此);as we all can see(正如我们看到的);be announced / expected / known / imagined / mentioned / said / shown / reported等。这些结构常放句首，偶尔也可以放句中或句末。
5. 非限制性定语从句中，which可指代主句中的某一个单词，as不可以。
6. “介词+关系代词(介宾代物)”中关系代词只能用which。
7. 从句中的谓语动词是否定形式时，常用which。
一、关系代词和关系副词基本用法
根据关系词在定语从句中的不同用法，可分为关系代词和关系副词。关系代词主要有who, whom, which, that, whose等，在定语从句中作主语、宾语、定语等;关系副词主要有when, where, why等，在定语从句中作状语。具体用法如下：
1.关系代词的用法
当先行词指人时，若它在从句中作主语，则用who;若它在从句作宾语，则用whom或who;若它在从句中作定语，则用whose。如：
☛The man who told me this refused to tell me his name. 告诉我这事的人不肯告诉我他的名字。
☛The woman whose umbrella you took is very angry about it. 你拿了那个女人的伞，她非常生气。
当先行词指物时，若在定语从句中作主语或宾语，则用which;若它在定语从句中作定语用，则用of which或whose。如：
☛I saw something in the paper which might interest you. 我在报上看到一样可能使你感兴趣的东西。
☛He’s written a book the name of which (whose name) I’ve forgotten. 他写了一本书，书名我给忘了。
2.关系副词的用法
关系副词主要有when, where, why等，在定语从句中作状语，分别表示时间、在点和原因。when主要放在time, day, years, season, age, occasion等时间的名词后;where主要放在place, city, town, village, house等地点名词后;why则通常只放在reason后。如(www.yygrammar.com)：
☛Wednesday is the day when the shops are not open in the afternoon. 星期三下午商店不开门。
☛Give me one reason why we should help you. 给我举出一个我们应当帮助你的理由。
要特别注意，activity, case, point, even, situation, job, organization, position等抽象名词后接where引导定语从句的用法(这是近几年高考的一个新热点)。如：
☛I don’t want a job where I’m chained to a desk all day. 我不想找一份整天坐办公桌前的工作。
☛Today, we’ll discuss a number of cases where beginners of English fail to use the language properly. 今天，我们将讨论一些英语初学者对英语使用不当的问题。
☛The treatment will continue until the patient reaches the point where he can walk correctly and safely. 治疗将会持续到病人可以正常且安全地行走。
☛If you risk something important, you cause it to be in a dangerous situation where you might lose it. 你如果拿重要的东西去冒险，那你就是将它置于一种可能会失去它的危险境地。
二、使用非限制性定语从句的情况：
1. 关系代词指代整个主句时，使用非限制性定语从句。
☛You did a lot for me, for which I was grateful. 你为我做了许多，对此我很感激。
☛The Diaoyu Island belongs to China, as is known to us. 众所周知，钓鱼岛属于中国。
☛A middle-aged woman killed her husband, which frightened me very much. 一个中年女子杀害了自己的丈夫,这令我十分恐惧。
2. 当先行词指的是世界上独一无二的事物或人名地名等专有名词时，使用非限制性定语从句。
☛China, which is my motherland, is developing fast. 中国是我的祖国，正在快速发展。
☛Eason, who was a pop star, got married last year. 伊森去年结婚了，他是明星。
☛Last Sunday they reached Nanjing , where a conference was to be held. 他们上周日到达南京，有个会议要在那里举行。
3. 当先行词指的是某人只有一个亲属(son，daughter等)时，使用非限制性定语从句。
☛He has a daughter, who is studying in London. 他有个女儿，现在正在伦敦学习。(只有一个女儿)
☛This is my teacher, who has something to tell you. 这是我的老师，他有一些事情要告诉你。
三、限制性定语从句与非限制性定语从句的区别
1. 形式不同
限制性定语从句主句和从句之间不用逗号隔开，口语中使用时也不停顿;而非限制性定语从句与主句之间通常有逗号隔开，口语中使用时有停顿。
2. 功能不同
限制性定语从句用于对先行词的意义进行修饰、限制和识别，如果去掉，就会造成句意不完整或概念不清;而非限制性定语从句用于对先行词起补充说明作用，如果省略，句意仍然清楚、完整。
☛People who take physical exercise live longer. 进行体育锻炼的人活得长些。(若把从句去掉句子就失去意义)
☛His daughter, who is in Boston now, is coming home next week. 他女儿现在在波士顿，下星期回来。(若把从句去掉，句子意义仍然完整)
3. 翻译不同
在翻译定语从句时，一般把限制性定语从句翻译在它所修饰的先行词之前，而把非限制性定语从句与主句分开。
☛He is the man whose car was stolen. 他就是汽车被窃的那个人。
☛I’ve invited Jim, who lives in the next flat. 我邀请了吉姆，他就住在隔壁。
4. 含义不同
比较下面的两个句子：
☛I have a sister who is a doctor. 我有一个医生的姐姐。(姐姐不止一个)
☛I have a sister, who is a doctor. 我有一个姐姐，她是当医生的。(只有一个姐姐)
5. 先行词不同
限制性定语从句的先行词只能是名词或代词，而非限制性定语从句的先行词则可以是名词或代词，也可以是短语或句子;另外，当先行词为专有名词或其他具有独一无二性的普通名词时，通常要用非限制性定语从句，而不用限制性定语从句。
☛Peter drove too fast, which was dangerous. 彼得开车很快，这是很危险的。(which指drive too fast)
☛He changed his mind, which made me very angry. 他改变了主意，这使我很生气。(which指整个主句)
☛Mr. Smith, who is our boss, will leave for Japan next week. 我们的老板史密斯先生下周要去日本。(先行词为专有名词，要用非限制性定语从句修饰)
☛Her father, who has a lot of money, wishes her to study abroad. 她父亲很有钱，希望她出国学习。(先行词为表独一无二意义的普通名词，要用非限制性定语从句修饰)
6. 关系词不同
关系词that和why可用于限制性定语从句中，通常不用于非限制性定语从句;另外，在限制性定语从句中，关系词有时可以省略，而在非限制性定语从句中关系词一律不能省略。
四、“介词+关系代词”引导的定语从句：
●“介词+关系代词”的用法
当关系代词在定语从句中作介词宾语时，我们通常用“介词+关系代词”引导定语从句。如果指“人”，用“介词+whom”;如果指“物”，用“介词+which”。
●“介词+关系代词”结构中介词的选用
1.一般来说，确定关系代词前的介词，可以从以下三方面入手：①先行词的意义;②从句中的动词或形容词与先行词的固定搭配;③句子的意思。
☞I’ll never forget the time during which I spent my childhood in the country.
我永远不会忘记孩童时代我在乡村度过的时光。
2.表示“整体和部分关系”，介词常用of。在some，any，few，none，all，both，neither，most，each等代词或数词的前、后可以用of which/whom。
☞John invited about 40 people to his wedding，most of whom are family members.
约翰邀请了大约40人参加他的婚礼，他们当中绝大部分是家庭成员。
3.有时“介词+where”可以引导定语从句，此时要和“介词+which”引导的定语从句从意思上加以区别。
☞His head soon appeared out of the window，from where he saw nothing but trees.
他的头很快从窗口探了出来，从那里除了树木他什么也看不到。(from where相当于from out of the window，而不是from the window)
●在定语从句中，含介词的短语动词不可拆开使用(短语拆开后含义发生变化)，如look after, look for等。
●“of which / whom”有时可以用“whose+名词”结构来改写。
●当先行词为way并且定语从句中缺少状语时，通常用in which或that引导定语从句(in which或that可省略);如果定语从句中不缺少状语，则用关系代词引导(that 或which 可省略)。
五、关系代词只用that而不用 which的情况
1.先行词是all，something，everything，anything，nothing，little，much，few等不定代词或先行词被all，any，every，no，little，much，some等词修饰。
☞All the people that come from the country work much harder.
所有来自农村的人工作都更努力得多。
2.先行词被序数词、形容词最高级、the only， the very， the last等修饰时， 关系代词通常只用that， 不用which.如：
☞The first English novel that I read was Cities.
我读的第一本英文小说是《城市》。
☞This is one of the most exciting football games that I have ever seen.
这是我见过的最激动人心的足球比赛之一。
☞This is the only thing that we can do now.
这是我们现在惟一能做的事情。
3.先行词既有人又有物时，关系代词只用that，不用which.如：
☞The scientist and his achievements that you told me about are admired by us all.
我们所有人都钦佩你告诉我的那位科学家和他所取得的成就。
☞The foreign visitors spoke highly of the pioneers and their performances that they saw at the Children’s Palace.
外国游客高度赞扬了他们在少年宫所看到的少先队员以及他们的表演。
4.关系代词在限定性定语从句中作表语并带有类比含义时，通常只用that，不用which.如：
☞He is no longer the star that he was.
他不再是过去的那位明星了。
☞Our school is no longer the school that it used to be.
我们的学校不再是以前的那所学校了。
5.句中其他位置已出现which，为避免重复，不用which而用that引导限定性定语从句。如：
☞Which is the car that has overtaken us?超过我们的是哪辆车?
篇3：高中英语定语从句课件参考
高中英语定语从句课件参考
教学过程
一、复习预习
1、对上节课课后作业中的问题进行查漏补缺；
2、导入：
e.g. She is a beautiful girl.
She is a beautiful girl who drives me crazy.
二、知识讲解
（一）定语从句定义
1、定语从句：在复合句中，修饰某个名词或代词的句子（做这个名词或代词的
定语）叫定语从句，定语从句一般放在被修饰的名词或代词后面。
2、先行词：被修饰的名词或代词叫做定语从句的先行词。
3、关系词：用来引导定语从句的词叫做关系词。
关系代词的种类：
关系代词：that, which, who, whom, whose, as
关系副词：when, where, why
4、定语从句结构：先行词+关系词+定语从句。
a、There she saw a wall of water that was quickly advancing towards her.
b、In Japan, someone who sees another person making the gesture will think it means money.
c、Visitors can go on exciting rides where they can feel what it is like to do the things they have seen their heroes do in the movie.
d、Oprah Winfrey is a black woman whose rise to fame is an inspiring story.
（二）定语从句分类
限定性定语从句：从句对先行词进行必要的描述或说明，对先行词起修饰限定作用，从句与先行词紧密相连，缺少它则句义显得不完整，一般不用逗号隔开。 非限定性定语从句：对先行词进行补充说明，解释，它与先行词关系松散，用逗号隔开。
1、The man who gave me this book is Tom .(限定性)
2、Tom,who is reading a book ,is my classmate (非限定性)
（三）关系代词
1、who指人，在定语从句中作主语。
e.g. The man who is sitting under the tree is a German .
2、Whom指人，在句中做宾语，可省略，但在做介词的宾语是只能用whom,不能用who。关系代词前有介词时不能省略。
e.g. I know the girl (whom) the teacher is speaking to .
I know the girl to whom the teacher is speaking .
3、whose, 作定语，可指人或物
e.g. Everyone heplps the child whose parents are dead.
Theywww.Wenku1.comare the lazy students whose homework wasn’t handed in .
4、that 指人或物，多指物，作主语（不能省略）或宾语（可省略）
e.g. He is the finest comrade that has helped us .
This is a plant that grows in the north .
5、which ,指物，在句中做主语（不能省略），或宾语（可省略）。
e.g. This is a plant which grows in the north .
☆常用that不用which的情况
1、当先行词是all, everything, anything, nothing, much, little, none, one等不定代词时，只用that。
歌诀助记：不定代词这路货，全用that准没错。
Pay attention to everything that I do.
2、当先行词被序数词或形容词最高级修饰时，只用that。
歌诀助记：先行词前被限定，千万不要用which。
This is the best novel (that)I have read.
3、如果出现两个或两个以上的先行词，并同时兼指人和物时，关系代词用that。 歌诀助记：两项并列人与物，引导定从用that。
They were talking about the person and things that they remembered in school.
4、当先行词被the only, the last, the way, the same等修饰时。
This is the last time that I shall give you a lesson.
5、在疑问词which开头的特殊疑问句中，为了避免重复只用that。
Which of the students that knows something about history.
6、当被修饰的成分是数词时，（被修饰成分是代名词one，指人时除外）只用that. I’ve got one that you might be interested in.
☆常用which，不用that的情况
1、引导非限制性定语从句。
Football, which is an interesting game, is played all over the world.
全世界都踢足球，它是一项有趣的运动。
2、直接放在介词后作宾语时（介词+关系代词结构中）。
Language is the most important tool without which people can't communicate with each other.语言是最重要的工具，没有它，人们便无法交流。
（四）关系副词
1、when 指时间
（1）在定语从句中作状语，先行词主要为一些时间名词（year ,day ,time,week等）,但时间名词在从句中作主语，宾语时，应用that，which，不能用when
e.g. I’ll never forget the time when (during which ) we worked on the farm.作状语 I still remember the day that/which is his birthay.做主语
He regretted the days that /which he spent on play . 做宾语
（2）It is the first time that …句型中，that是习惯用法，不用when。
e.g. It is the first time that I have been to the Great Wall .
2、where 指地点
（1）指前面的地点，在从句中作状语。
e.g. I know the factory where I worked twenty years ago .
（2）指地点，在句中作主语，宾语时不能用where，须用that/which .
e.g. This is the house where he has lived for 20 years （作状语）.
This is the house that he has lived in for 20 years .（作宾语）
e.g. This is the shool ｛in which /where we study every year.（作状语）
This is the shool that /which we visited yesterday. （作宾语） .
（3）当先行词为某个方面、情况、阶段、位置等的词时使用关系副词
3、why 表示原因
“the reason why ….that…. ”中，不能用because 代替that .
e.g. That’s the reason why (for which ) he didn’t come to school .
The reason why he didn’t attend the meeting is that he was ill .
但reason 在从句中做宾语时，关系代词用that/which ,可省略
e.g. I don’t believe the reason (which/that) he gave me .
（五）“介词+关系代词”引导的定语从句
当先行词在定语从句中作介词的宾语时，往往可以把介词放在关系代词之前，构成“介词+关系代词（whom/which）”结构。但一些短语如look after 等中的介词不能与动词分开，故不能放在关心代词之前。确定介词时：
一是，依据定语从句中动词所需要的某种习惯搭配；
二是，依据先行词的某种习惯搭配；
三是，根据所要表达的意思来确定。
e.g. That’s the reason why (for which ) he didn’t come to school .
（六）非限定性定语从句
关系代词在非限定性定语从句中的用法。
指人做主语用who,作宾语用whom ，指地点用where，指时间when，指物只用which，不能用that，作定语用whose。
e.g. He didn’t see the film, which was very interesting .(不用that)
（七）as 引导的限制性定语从句
A . such ….as 和 the same…as 的用法
such ….as： 像….一样的，像…..之类；the same…as： 和…..同样的
在这两个句型中，as是关系代词，such和same 作定语，修饰主语里的某个名词（或代词），这个名词是由as引导的定语从句的先行词，as在从句中可担任主语、宾语或表语。
Eg： We have found such materials as are used in their factory.( 在从句中作主语) I seldom give my students such a difficult problem as they cannot work out.（在从句中作宾语）
The result is not the same as they had expected.( 在从句中作宾语)
重点比较 :
the same …as…和 the same …that…
the same…as…:和…..相同（代指同类事物）；
the same …that…：和….相同（代指同一事物）
两者都引导定语从句。as 从句中说明的名词与the same 修饰的名词是同一类，而非同一个。that从句中说明的名词与the same 修饰的名词是同一个。
Eg：He is reading the same book that you bought yesterday.
He is reading the same book as you bought yesterday.
This is the same pen that I lost. =This is the pen that I lost.(指同一支笔)
This is the same (kind/type/sort) of pen as I lost.（指同类型的笔，但并不是我丢失的那一支）
B. ….such as …的用法
….such as …中的such为代词，意思是“这样的人或物”，as 在从句中作宾语，修饰先行词such。
Eg： This book is not such as I expect.
He told me of his experience such as I had never had before.
相关链接：
such as 还有“诸如，例如，像…那样的”的意思，此时后面跟名词或名词短语等。
Eg：They bought a lot of fruit, such as apples,oranges,etc.
（八）as 引导的非限制性定语从句
as 可以像which一样引导非限制性定语从句，用来代表整个句子的内容，它的先行词可以是名词，也可以是不定式短语或整个句子。as 在从句中作主语、宾语和表语。此外，有些as 引导的定语从句已成为固定用法，如：
As we know As has been said before 如上所述 As is known to all As is often the case 像通常那样 As is reported As was expected 正如预料的`那样 Eg： She is very careful, as her work shows.
As we know, smoking is harmful to one’s health.
As is often the case, we have worked out the production plan.
重点比较：as 和which 引导的非限制性定语从句的联系和区别
1、as 和which 都可以代替整个句子，当定语从句置于主句之后时，as和which可以和互换。
Eg：He didn’t tell me any news, as/which upset me.
2、Which引导的从句，代表的前面的整个主句时，不能放在主句之前。而as 引导的定语从句，代表整个主句时，可以放在主句之前或之后，有时也可以放在主语和谓语之间。
Eg：As is reported in the newspapers, talks between the two countries are making progress.
= Talks between the two countries, as is reported in the newspapers, are making progress.
As与that的区别
As 引导的定语从句表示它的内容与主句所讲的内容相似，即指同类事物；that 引导定语从句表示的内容与主句相同，即为同一事物。
e.g. This is the same pen that I lost yesterday .这正是我昨天丢的钢笔。
This is the same pen as I lost yesterday .这正像我昨天丢的钢笔。
（九）同位语从句与定语从句区别
1、同位语从句和定语从句结构相似，通常位于某一名词或代词之后，但两者存在明显区别：同为语从句对名词性成分加以补充说明，是该名词性成分具体内容的体现（相当于名词的作用）。That 引导的同位语从句中引导词that不在该同位语从句中充当成分，但不能被省略，同位语从句还可以用whether,how等连词引导（定语从句则不能）。定语从句对先行词加以限制或修饰，说明先行词的性质或特征（相当于一个形容词的作用），定语从句的引导词均在该定语从句中充当成分（that在其引导的限定性定语从句中充当主语，宾语或表语，充当定语从句的宾语，that可以省略）注意体会一下三组例句。
（1） 第一组
① We can’t solve the problem how we can travel faster than light .我们解决不
了如何才能超过光的速度这个问题。
② I can’t remember the problem that they have.我记不得他们的问题了。
（2） 第二组
① I won’t believe the fact that he lied to his mother.我不愿相信他对他母亲撒
谎的事实
② I won’t believe the fact (that) he told me .我不愿相信他告诉我的事实。
（3） 第三组
① The news that Tom would go abroad is told by him. 汤姆将出国的消息是他
讲的。
The news that he told me is that Tom would go abroad next year.他告诉我的消息是汤姆来年将出国。
三、例题精析
例题1.【全国卷I】The prize will go to the writer ________ story shows the most imagination.
A. that B. which C. whose D. what
【解析】C。句意为“奖项将会颁发给故事展示了丰富想象力的作者。” 根据从句不缺成分和它与先行词的关系可判断前后为所属关系，选whose作定语。
例题2.〖10全国Ⅱ〗I refuse to accept the blame for something ________was someone else’s fault.
A. who B. that C. as D. what
【解析】B。从句缺主语，先行词为物。
例题3.【2011江苏卷】Between the two parts of the concert is an interval, _______the audience can buy ice-cream.
A. when B. where C. that D. which
【解析】A。从句不缺任何成分，且先行词为时间。
例题4.〖08浙江〗Yesterday she sold her car, ______ she bought a month ago.
A. when B. where C. that D. which
【解析】D。从句缺宾语，且为非限制性定语从句。
例题5. (陕西)______ is often the case with children, Amy was better by the time the doctor arrived.
A. It B. That C. What D. As
【解析】D。固定搭配“as is often the case”，像通常一样。
例题6. (浙江卷)Ellen was a painter of birds and of nature, _____, for some reason, had withdrawn from all human society.
A. which B. who C. where D. whom
【解析】B。从句缺主语且先行词为人。
四、课堂运用
【基础】
1.The place _______interested me most was the Children's Palace.
A. Which B. where C. what D. in which
2.Do you know the man _______?
A. whom I spoke B. to who spoke C. I spoke to D. that I spoke
3.This is the hotel _______last month.
A. which they stayed B. at that they stayed
C. where they stayed at D. where they stayed
【巩固】
4.Do you know the year ______the Chinese Communist Party was founded?
A. which B. that C. when D. on which
5.That is the day ______I'll never forget.
A. which B. on which C. in which D. when
6.The factory ______we'll visit next week is not far from here.
A. where B. to which C. which D. in which
【拔高】
7.Great changes have taken place in the factory ____we are working since then.
A. where B. that C. which D. there
8.This is one of the best films _______.
A. that have been shown this year B. that have shown
C. that has been shown this year D. that you talked
9.Can you lend me the book ______the other day?
A. about which you talked B. which you talked
C. about that you talked D. that you talked
10.The pen ______he is writing is mine.
A.with which B.in which C.on which D.by which
课程小结
本节课的知识点相对比较多但难度系数不大，主要是讲定语从句的各个关系词具体用法。主要从九个方面进行讲解，详细讲解了定语从句中各个关系代词、关系副词的用法和区别。本部分的学习还是要求学生掌握关键词，具体什么时候需要使用关系代词或者关系副词，什么叫做定语从句，希望学生能够保持思路清晰，做题的时候十拿九稳。
课后作业
【基础】
1. Nearly all the streets are in straight lines, ________ from east to west. Those ________ run from north to south are called avenues.
A. running; that B. run; who C. running; who D. run; that
2. This is the case ________ he’s had all his money stolen.
A. when B. where C. that D. on which
3. Mr. Smith will pay a visit to Beijing this autumn, ________ we will enjoy the Olympic Games in .
A. where B. when C. which D. how
【巩固】
4. The artist will not paint people or animals but he will paint anything ________ .
A. that the little girl asks him B. the little girl asks him to
C. for the little girl to ask him D. what the little girl asks him
5. —How did you get in touch with the travel agent, Robin?
—Oh, that's easy. I surfed the Internet and then called one ________ the telephone number is provided.
A. which B. in which C. of which D. whose
6. October 15 th is my birthday, ________ I will never forget.
A. when B. that C. what D. which
【拔高】
7. The treatment will continue until the patient reaches the point ________ he can walk correctly and safely.
A. when B. where C. which D. whose
8. There are several research centers in China ________ a certain disease called Bird Flu is being studied.
A. which B. where C. when D. what
9. I hope that the little ________ I have been able to do does good to them all.
A. which B. what C. that D. when
10. The time is not far away ________ modern communications will become widespread in China's vast countryside.
A. as B. when C. until D. before
课后评价
这节课总体感觉课堂进程比较自然、顺利，学生始终处在主动参与和积极配合的状态中，达到了预期设想，体现了“学中用，用中学”的任务型语言教学理念。定语从句是中学英语教学的一个重要语法项目。学生在学习这一语法时，虽然感到困难很大，但理清语法知识点之后也觉得定语从句语法知识结构清晰并易于理解。希望学生课后能主动巩固并复习，同时加强单词记忆。
篇4：高中英语定语从句难点解析
定语从句的引导词分为关系代词(who， whom， whose， which， that)和关系副词(where， when， why)两类，这些引导词在引导定语从句的同时均在从句中充当成分。关系代词可作主语、宾语和定语，作宾语时可省略;关系副词可作状语，一般不能省略。下面简单介绍一下定语从句的难点。
一、介词(短语) + 关系代词 / 副词
1. 此处关系代词只能是which / whom / whose / where / when，而不能用who / that.
如：They arrived at an old building， in front of which stood a tower. He climbed up to the top of the tree， from where he could see clearly what was happening in the woods.
2. 不定代词 / 数词 + of which / whom.
如：Mrs. Green has three sons， none of whom works in the city. The boys discovered many pictures on the walls of the cave， most of which dated back to 15，000 years ago.比较：The boys discovered many pictures on the walls of the cave， most of them dating back to 15，000 years ago. (此处是独立主格结构)
二、whose whose既可指人也可指物，指物时whose + 名词 = of which + the + 名词 / the +名词 + of which.
如：The plastic bottle， whose top / of which the top / the top of which is cut off， can be used as a container to grow plants in.比较：The plastic bottle， (with) the top cut off， can be used as a container to grow plants in. (此处为独立主格结构)
三、which和as which和as都可引导非限制性定语从句，用来指代整个主句的内容， which 引导的从句只能放在主句后，as 引导的从句放在主句前后均可;which 意为“这一点”，as 意为“正如”。as还可用于the same …… as， such …… as等结构中，引导限制性定语从句。
如：He turned out to be a great success as a dancer， which was more than we could expect. As is known to all， Madame Curie is the first woman scientist in the world to have won two Nobel Prizes. Have you bought the same dictionary as I referred to yesterday?
四、非地点名词作先行词时用where 引导定语从句的特例通常先行词是地点名词，且定语从句的引导词在从句中作地点状语时，用where 引导定语从句，但有时先行词是非地点名词时，也须用where 引导定语从句，表示抽象意义的一种状态，此类词包括point， situation， case 等。
如：The treatment will continue till the patient reach the point where he can walk correctly and safely. (point意为“程度”)
Can you think of a situation where this idiom can be used? (situation意为“情景”)
There‘re always cases where non?鄄native English speakers can’t make themselves understood just because of their lack of culture background of the visited countries. (case意为“情形，情况”)
五、way和time作先行词时的情况
1. way作先行词，意为“方式、方法”时，引导词在从句中作状语，可用that / in which 引导，也可省略;若引导词作从句的主语或宾语，用that / which 引导，引导词作宾语时可省略。
如：I‘ve thought of a good way (that / in which) we can conduct the experiment successfully. The way that / which will be used to carry out the operation was suggested by Doctor White. This is the very way (that / which) we need to test the theory.
2. 先行词是time时，若表示“次数”，应用that引导定语从句，that可省略;若time表示“一段时间”，则用when或at / during + which引导定语从句。
如：This is the second time (that) the President has visited the country. This was at a time when / during which there were no radios， no telephones or TV sets.
篇5：高中定语从句语法知识课件
高中定语从句语法知识课件
一 名词性定语从句
1. 主要包括主语从句,宾语从句,表语从句和同位语从句. 一般由that引起,也可由who, what, when, why,which, whom, whether, how 引起.
2. 主语从句很多情况下都可以放到句子后面,而用代词it作形式上的主语.
3. 形式宾语
4. 由名词性关系代词whatever, whoever,whichever 等引起的宾语从句
5. whether and if 都能引导从句, 但用法有所不同. 当主语从句直接位于句首时,应用whether,而不用if. Whether 后能直接or not, 但if 不能.
Whether he will come or not is not known.
6. 在名词reason后的表语从句必须用that引导, 不可误用because.
The reason why he is often late for class is that hehas the bad habit of getting up late in the morning.
二、定语从句
1. 引导定语从句的关系词有who, whom, whose,that, when, where, why and which. 在非限制定语从句中, 只可用which, who, whose, where , when., 如果指代前面整个句子,多用which.
2. 当引导定语从句的先行词前有all, any, no,little, much, very first 等词, 或先行词前为形容词最高级所修饰时,或先行词为all, anything, nothing, something,everything 时,从句的引导词只能用that.
3. as 可做引导词引导定语从句, 多和such, the same 连用. As 引导的定语从句也可修饰整个句子, 既可放在先行词后,也可放在句子开头.
4. 介词+which/whom/whose从句
5. 代/名+介词+which 从句
6. 同位语从句和定语从句
三、定语从句的关系词
引导定语从句的关系词有关系代词和关系副词，常见的关系代词包括that， which， who(宾格whom，所有格whose)等，关系副词包括where，when， why等。关系代词和关系副词放在先行词及定语从句之间起连接作用，同时又作定语从句的重要成分。
四、定语从句的分类
根据定语从句与先行词的关系，定语从句可分为限制性定语从句及非限制性定语从句。限制性定语从句紧跟先行词，主句与从句不用逗号分开，从句不可省去，非限制性定语从句主句与从句之间有逗号分开，起补充说明作用，如省去，意思仍完整。
五、关系代词的用法
1. that 既可以用于指人，也可以用于指物。在从句中作主语或宾语，作主语时不可省略，作宾语可省略。例如：
Mary likes music that is quiet and gentle.玛丽喜欢轻柔的音乐。(that作主语)
The coat (that) I put on the desk is blue.我放在桌子上的那件外套是蓝色的。(that作宾语)
2.which用于指物，在句中作主语或宾语，作主语不可省略，作宾语可省略。例如：
The building which stands near the train station is asupermarket.位于火车站附近的'那座大楼是一家超市。(作主语)
The film (which) we saw last night was wonderful. 我们昨天晚上看的那部电影很好看。(作宾语)
3.who， whom用于指人，who 用作主语，whom用作宾语。在口语中，有时可用who代替whom， 也可省略。例如：
The girl who often helps me with my English is fromEngland.经常在英语方面帮助我的那个女孩是英国人。(作主语)
Who is the teacher (whom) Li Ming is talking to? 正在与李明谈话的老师是谁?(作宾语)
六、关系副词的用法
(1)when指时间，其先行词表示时间，在句中作时间状语。例如：
This was the time when he arrived.这是他到达的时间。
(2)where指地点，其先行词表示地点，在句中作地点状语。例如：
This is place where he works.这是他工作的地点。
(3)why 指原因，其先行词是原因，起原因状语作用。例如：
Nobody knows the reason why he is often late forschool. 没人知道他为什么上学总迟到。
篇6：中考英语知识梳理：定语从句
共13人对这份知识概要评价，平均分为3
(总分为5分)
定语从句是现行教材中新增加的一个重要语法项目，同时也应是各地中考的必测内容之一。本文试结合典型试题就该语法项目中可能出现的考点作分类例析，供同学们复习迎考时参考。
【考点预测1】考查关系代词与关系副词的用法。
【典型题例】
-I drove to Zhuhai for the air show last week．
-Is that the reason ______ you had a few days off？
A．why
B．when
C．what
D．where
【简析】根据题意可知，上句是下句“请假”的原因，所以应该选择表示原因的关系副词why来修饰the reason，故A项正确。
【考点归纳】定语从句中常见的关系代词有who（whom），whose，that和which，它们的用法分别为：
① who用来代人（即它的先行词必须是人），在从句中可担任主语和宾语。但who的前面不能有介词，如果带介词，则必须用宾格的whom ：介词＋whom。如：
He is the boy with whom I went there．他就是和我一起去那儿的男孩。
另外，当关系代词that用来代人时，关系代词who和that在许多情况下可以通用。但有时须用who，而不用that：
a．先行词是one，ones，anyone和those时，须用who。如：
One who has nothing to fear for oneself dares to tell the truth．
一个无所畏惧的人敢于说实话。
b．在there be开头的句子中。如：
There is an old man who wants to see you．有位老人要见你。
c．一个句子带有两个定语从句，其中一个定语从句的关系代词是that，另一个须用 who。如：
The girl that you met last week is the monitor who studies very hard．
上周你遇到的那位女孩是位学习非常努力的班长。
② whose是代词的所有格，它既可以代人也可以代物。当whose代物时，它相当于… of which。如：
Please show me the book whose cover is black．
＝Please show me the book，the cover of which is black．
请把封面是黑色的书拿给我看看。
③ 当that和which在限定性定语从句中代物时，which常可以和that通用，但有时只宜用which，不用that：
a．关系代词前有介词。如：
This is the room in which you will stay．这将是你住的房间。
b．如果两个定语从句，其中一句的关系词是that，另一句宜用which。如：
Let me show you the book that I borrowed from the library，which was newly open to us．
让我给你看看我从重新开放的图书馆借来的书。
另外，非限定性定语从句中，只宜用 which，不能用that。
关系副词where，when和why用来引导定语从句时，它和关系代词一样，具有多种作用：
a．在定语从句中代替先行词。
b．在从句中担任成分--状语，在从句中起副词和介词短语作用。
c．起连接作用，它把两个句子连接成为一个带有定语从句的主从复合句。如：
This is the house where I was born．这是我出生的那间房子。
We'll never forget the day when we joined the League．我们永远难忘入团的那一天。
The reason why I am calling you is to invite you to my birthday party．
我给你打电话是因为想邀请你参加我的生日聚会。
【解题技巧】由上可见，选择关系代词与关系副词的关键取决于关系词在从句中所担当的成分：如果关系词在从句中作主语、宾语、表语、定语时，只能用关系代词；如果关系词在从句中作状语（时间、地点、原因）则用关系副词。
【考点预测2】考查that引导的定语从句。
【典型题例】
This is the best way ______ has been used against pollution．
A．where
B．why
C．which
D．that
【简析】指事物的先行词前有“形容词最高级”修饰时，只能用关系代词that。故本题的正确答案是D项。
【考点小结】如有下列情形之一者，只能用that引导定语从句。
a．先行词为all，everything，anything， nothing，few，little，much，any，the one等时。
b．先行词既有人又有物时。
c．指事物的先行词前面有“形容词最高级”、“序数词”或no，the only，the very，the last修饰时。
d．以who，which引出的特殊疑问句中含有定语从句。
【考点预测3】考查which在非限定性定语从句中的应用。
【典型题例】
The result of the experiment was very good，______ we hadn't expected（预料）．
A．when
B．that
C．which
D．it
【简析】该题中所提供的四个选项中，it不可引导从句，that不能引导非限定性定语从句，when不合题意，故正确答案只能是C项。
核心知识
【考点小结】
① 限定性定语从句用于修饰和限定先行词，与先行词之间的关系非常密切。它所修饰的词代表一个（些）或一类特定的人或东西。如果删去，则剩下的部分意思就会含糊不清。如：
This is the man who gave me the money．这就是给我钱的那个人。
上句如删去从句who gave me the money，则成了This is the man．（这是那个人。）完全失去了整个句子的意思，因而不能删掉。
② 非限定性定语从句，在意义上，它是先行词的一个附加修饰语，是对先行词的进一步说明。如果删去它，不影响整个句子的基本意思。如：
Wang Dong，who is in the room，wants to ask you some questions．
王东，他在房间里，想问你几个问题。
上述主句是Wang Dong wants to ask you some questions，如果删去从句（who is in the room），并不影响整个句子基本意思的表达。
③ 限定性定语从句和非限定性定语从句的区别可用表解如下：
④ 另外，在意思上，有时限定性和非限定性定语从句的区别还是较大的。如：
In their class，there are fifteen students who can speak English well．（限定性定语从句）在他们班上有十五位英语说得好的学生。（可以看出他们班学生要多于十五位）
In their class，there are fifteen students， who can speak English well．（非限定性定语从句）他们班上有十五位学生，他们英语说得很好。（可以看出他们班上共有十五名学生，他们英语口语都好。）
【考点预测4】综合考查引导宾语从句的连词和引导定语从句的代词的用法。
【典型题例】
He said _____ the man ______ had robbed the bank had long hair．
A．who；who
B．who；that
C．that；who
D．that；which
【简析】该题为：他说那个抢劫银行的男人留着长发。通过审题可发现在该复合句中，既包含了宾语从句，也包含了定语从句，根据宾语从句和定语从句的相关知识，可知正确答案应是C项。
【考点预测5】考查把简单句转换为含有定语从句的复合句。
【典型题例】
I like Chinese tea with nothing in it．（同义句）
I like Chinese tea ______ nothing in it．
【简析】原句意为“我喜欢中国清茶”。通过观察下句可知应用定语从句来修饰“tea埂9收确答案为：that／which has。
【解题技巧】定语从句常用来修饰名词或代词，来表达所修饰的名词或代词的特征。所以中考在该题型上常考查：
a．关系代词或关系副词的选用。
b．主谓一致。
试对比：I bought a book yesterday．It was very interesting．
＝The book which I bought yesterday was very interesting．
I bought some books yesterday．They were very interesting．
＝The books which I bought yesterday were very interesting．
【考点预测6】考查“将含有定语从句的复合句转换为简单句”。
【典型题例】
The girl who is wearing the red coat is very clever．（同义句）
The girl ______ the red coat is very clever．
【简析】读题后可知：上句含义是“穿红上衣的女孩非常聪明”，对应下句时，可知空格处应填“穿”，故in是正确答案。
【解题技巧】in，with连接短语或词组来修饰名词，表明名词的形态和特征。这类简单句可以转换为定语从句。如：
The strange thing with three legs was used for drinking long before．
＝The strange thing which／that has three legs was used for drinking long before．
【考点预测7】考查定语从句中动词的时态。
【典型题例】
Miyoko was looking at the photos that she ______ in Beijing．
A．was taking
B．takes
C．has taken
D．had taken
【简析】该题中主句是过去进行时，因此首先排除B、C两项。再根据常识，又可排除A项。故只有D项为正确答案。
【解题技巧】语境型时态题在近年各地中考试题中频频出现，在定语从句中考查动词的时态，使考生更难准确判断动词的时态。解该类题时，同学们一定要领会语境，然后再根据主、从句中动词的先后顺序来确定动词的时态。
总之，定语从句知识点繁多，但在现行教材中涉及到的内容较少。同学们在复习时，应注重基本知识的牢固掌握，对一些常见的考点熟记于心，再进行适当练习，中考时定能取胜。
篇7：英语中限制性定语从句相关知识讲解
限制性定语从句
限制性定语从句是对先行词的内容进行严格、明确限定的定语从句，与先行词的意思关系非常紧密。
此时如果把限制性从句移除，先行词的意思就会受影响，意思不完整、不清楚或者有很大的变化。
所以，限制性定语从句是不能移除的。
例如：
Give me the article that tells our company.
把讲述我们公司的文章给我。
(限定的是“讲述我们公司的那篇文章”，而不是别的文章)
Which is the motorb ike that you fixed on the 12th?
哪辆是你12号修理的摩托车?
(限定的是“你12号修的那辆摩托车”，不是别的或者其他日子修的摩托车)
定语从句中关系词的用法。
1.That is reason why I gave it up.
改为That is the reason why/why I gave it up.
2. Is this the place you are living?
改为：Is this the place you live in? Is this the place where you live?
3*. The books whom I bought are about languages.
改成：The books which/that I bought about languages
4*. There are some trees which’s leaves are yellow.
改成There are some trees whose leaves are yellow.
5*.Anyone that is well-educated won’t behave like this.
改成Anyone who is well-educated won't behave like this.
这里，
当先行词是he,one,all,any,they等时
例如： He who has not reached the Great Wallisn't a true man。
不到长城非好汉。
All who had seen this filmwere moved。
看过这部电影的人都受感动。
anyone应该是属于这一类。
作者|丹丹英语
联系公众号：英语语法学习
篇8：定语从句与先行词相关知识讲解
英语语法中的定语主要修饰、限定、描绘名词，有时候也修饰代词。
定语从句只能放在被修饰名词成分后面。
例如：
I have two close friends who are good at playing chess.
我有两位擅长下象棋的密友。
We saw a fox whose tail was very long.
我们看见一只尾巴很长的狐狸。
•引导定语从句的关系词
关系代词：who, whom, whose, which, that
关系副词：when, where, how, why
先行词
被定语从句修饰的名词叫作先行词。
先行词有时也可是代词、数词。
例如：
Let’s watch the English book that I bought yesterday.
(English book是先行词，下划线部分是定语从句)
我们看看我昨天买的英语书吧。
We went to the place where she stayed.
(place是先行词，下划线部分是定语从句)
我们去了她待过的地方。
注意：大部分情况下，先行词紧贴在定语从句前面，但是，有时候也会出现先行词与定语从句隔开的情况，此时需要根据逻辑意思判断哪个是被修饰的先行词。
例如：
She has got a map of China which is about 2 meters long.
(map是先行词，被of China隔开了。下划线部分是定语从句)
I know a girl from Ningbo who has passed TOEFL.
(girl是先行词，被from Ningbo隔开了。下划线部分是定语从句)
我集训一位已经通过托福考试的宁波女孩。
作者|丹丹英语
公众号：英语语法学习
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