下面小编给大家整理高二英语下册的必记知识点分析，本文共5篇，希望大家喜欢！本文原稿由网友“铁蛋儿”提供。
篇1：高二英语知识点下册
Ⅰ.Hot words and hot phrases常用词与常用词组
1.Medical studies show that AIDS virus cannot be transmitted via the following routes：cups，glasses，toilet seats，swimming pools，mosquitoes，other insects or blood donation.(P.49)
2.AIDS is a disease that breaks down the body's immune system and leaves a person defenceless against infections and illness.(P.51)
3.People get AIDS after having been infected with the HIV virus.(P.51)
4.People transmit HIV by having unprotected sex，by receiving infected blood transfusions or，as in Xiaohua's case，through birth.(P.51)
5.Xiaohua's mother contracted the HIV virus when she was 28，and she died of AIDS only three years after Xiaohua was born.(P.51)
6.The disease is spreading faster in Africa and parts of Asia，mainly because of a lack of proper health care，prevention and education.(P.51)
7.The drugs that are available are much too expensive and difficult to find.(P.51)
8....but she does not let that knowledge discourage her.(P.51)
9.She also goes to visit other AIDS patients in hospitals across the country to support them and cheer them up.(P.51)
10.The disease is not the only thing that AIDS patients have to suffer from.(P.52)
11....that can persuade hospitals and companies to allocate more funds for AIDS research and education.(P.52)
12.Xiaohua has learnt to live with HIV and the fact she will eventually get AIDS.(P.52)
13.Two years ago，Dr Richards had asked me a great many questions and had taken samples of my blood.(P.55)
14.Mum held my hand and I saw that she was weeping.(P.55)
15.Cancer is a disease that begins in cells.(P.55)
16.In my body，the production of cells is disrupted.(P.55)
17.Doctors do know that cancer is not caused by injury and is not contagious—it does not spread from one person to another.(P.55)
18.The cancer in my body has been defeated for the moment.(P.55)
19.Living with cancer has made me realize how precious life is and how important it is for us to take every chance to live life to the fullest.(P.55)
20.Every day is a new opportunity and I have learnt to appreciate every minute of each day.
篇2：高二英语下册知识点
1)whether和if常用来引导宾语从句，这时两者的含义区别很小，一般可通用。例如： ①I don't know whether/if they will come to help us. 我不知道他们是否来帮助我们。 ②I am not sure whether/if I'll have time to go with you. 我很难说我们是否有时间跟你们一起去。 上面两句无区别。
但是，当whether与or not连成一个词组时，whether不可换用if。例如： ③I don't know whether or not they will come for our help. 我不知道他们是否要来求我们支援。 【注意】若whether和or not不连在一起，在口语中可以用if取代whether，当然也可以用whether。例如： ④I am not certain if/whether the train will arrive on time. 我没有把握火车是否准时到达。 ⑤I don't care if/whether your car breaks down or not. 我不在乎您的车是否是会出故障。
此外，还有三种情况值得注意：
(1)在介词后面只能用whether，不能用if。例如： ①This depends upon whether we are determined to do it. 这件事要看我们是否有决心去做。 ②It depends on whether he is ready. 这件事要看他是否有准备。 ③I am not interested in whether you'll come or not. 你来不来我不感兴趣。 ④We haven't settled the question of whether we'll renew our supplies of coal for factory. 是否要为我们工厂补充一些煤，这个问题我们还没有决定。 (2)在动词不定式之前，只能用whether，不能用if。例如： ①He doesn't know whether to stay or not. 他不能知道是否要留下来。 ②She doesn't knows whether to get married now or wait. 是否现在结婚或是等待她不知道。 (3)在及物运动discuss后的宾语从句中，只能用whether，不能用if。例如： ①We discussed whether we should make a change in our plan. 我们讨论了是不是要对我们的计划作一些修改。 ②We were discussing whether we should discuss the business with them. 我们正在讨论我们是否要和他们谈这个生意。
2)引导主语从句时，只能用whether，不能用if。例如： ①It is unknown whether he will come. 他是否来还不知道。 ②Whether the news is true remains a question. 这个消息是否真实仍然是个问题。
3)引导表语从句时，只能用whether，不能用if。例如： ①What we want to know is whether he will come to speak to us tomorrow. 我们想知道的是他明天是否来给我们讲话。 ②The question is whether they can take our advice. 问题是他们是否能接受我们的意见。4)引导同位语从句时，常用whether。例如： ①The question whether we'll build another lecture buil你到底想说什么 hasn't been settled. 是否要另建一幢教学楼的问题还未决定。 ②The question whether he'll come is unknown. 他是否来的问题还不知道。
5)可以用来引导一个否定的宾语从句，whether则不能用来引导否定的宾语从句，因为它表示正反两方面的选择意义比较强。例如： ①Tell me if it is not going to rain, please. 请告诉我明天是否不会下雨。 ②He considered if he shouldn't tell her the secret. 他考虑他是否不该告诉她这个秘密。
6)if除引导宾语从句外，还可以引导条件状语从句，作“是否”解。在容易引起混淆产生歧义的情况下，就不可用if，而须用whether。例如： ①Please let me know if you intend to come.这个句子有两种解释： A：“请让我们知道你是否想来。” B：“如果你打算来，请让我们知道。” 第一种解释是把if引导的从句看作宾语从句，把动词know视为及物动词(vt.);第二种解释是把if引导的从句当作条件状语从句，把动词know看作不及物动词(vi.)。 在口语中，我们可以通过语调来表示两者的区别;但是，在书面语中，无上下文(如一张便条上写着这句话)，那就含混不清了。如果我们想表达的第一种含义，就得用whether来改写第一句。 ①Please let me know whether you intend to come. 又如： ②Let me know whether he has left for Shanghai. 告诉我他是否已经去上海了。 ③Let me know if he has left for Shanghai. 如果他去上海，请告诉我一声。 此外，whether还可以引导让步状语从句，作“无论、不管”解。
篇3：高三物理必记知识点分析
1、原子的核式结构
(1)粒子散射实验结果：绝大多数粒子沿原方向前进，少数粒子发生较大偏转。
(2)原子的核式结构模型：在原子的中心有一个很小的核，叫做原子核，原子的全部正电荷和几乎全部的质量都集中在原子核里，带负电的电子在核外空间绕核旋转.
(3)原子核的大小：原子的半径大约是10-10米，原子核的半径大约为10-14米～10-15米.
2、玻尔理论有三个要点：
(1)原子只能处于一系列的不连续的能量状态中，在这些状态中原子是稳定的.电子虽然绕核旋转，但并不向外辐射能量，这些状态叫定态.
(2)原子从一种定态跃迁到另一定态时，它辐射(或吸收)一定频率的光子，光子的能量由这两个定态的能量差决定.即hν=E2-E1
(3)原子的不同能量状态对应于电子沿不同圆形轨道运动.原子的定态是不连续的，因而电子的可能轨道是分立的.
在玻尔模型中，原子的可能状态是不连续的，各状态对应的能量也是不连续的，这些不连续的能量值的能量值叫做能级。
3、原子核的组成核力
原子核是由质子和中子组成的.质子和中子统称为核子.
将核子稳固地束缚在一起的力叫核力，这是一种很强的力，而且是短程力，只能在2.0X10-15的距离内起作用，所以只有相邻的核子间才有核力作用.
4、原子核的衰变
(1)天然放射现象：有些元素自发地放射出看不见的射线，这种现
象叫天然放射现象.
(2)放射性元素放射的射线有三种：、射线、射线，
这三种射线可以用磁场和电场加以区别，
(3)放射性元素的衰变：放射性元素放射出粒子或粒子后，衰变成新的原子核，原子核的这种变化称为衰变.
衰变规律：衰变中的电荷数和质量数都是守恒的.
(4)半衰期：放射性元素的原子核有半数发生衰变所需要的时间称为半衰期.不同的放射性元素的半衰期是不同的，但对于确定的放射性元素，其半衰期是确定的.它由原子核的内部因素所决定，跟元素的化学状态、温度、压强等因素无关.
(5)同位素：具有相同质子数，中子数不同的原子在元素周期表中处于同一位置，互称同位素。
篇4：高二英语必拿下的知识点
1.做主语：-般来说，不定式和动名词成份相同时，表示客观性、一般性行为为多用动名词表示，而表示一次性、具体性行为则多用不定式。
Looking after children is her job.
To clean the classroom is his job today.
2.做宾语：
I like swimming, but I don't like to swim today because I don't feel well.
(1).有些动词只能接不定式做宾语，这些动词接上不定式，含有明显的主观性和将来性意义。如：help，hope，ask，refuse，decide，promise，wish，pretend，expect，arrange，learn，plan，demand，dare，manage，agree，prepare，fail，determine，offer，choose，desire，elect，long，(happen，seem)，等等。
He refused to speak on the radio.
He desired to see you.
(2)..有些动词只接动名词做宾语，这些动词接上动名词，含有明显的“依据往事或经验来作出理解和判断”的意思。mind，finish，enjoy，suggest，permit，appreciate，consider，miss，dislike，keep(on)，avoid，permit，imagine，risk，escape，admit，stand(忍受)，allow，forbid，excuse，等等。
短语动词：give up，put off，look forward to，feel like，insist on，object to，prevent…from，set about，can't help，be/get used to等
短语：be worth doing，be no good doing，be no use doing，be busy doing等
The mother did agree to let the boy risk swimming across the river.
She can't stand having nothing to do at home.
His wife doesn't allow smoking inside the room and often advised him to give up smoking.
All the family insisted on my staying with them a few days longer.
It's no good learning without practicing.
I'm looking forward to hearing from you soon.
She doesn't feel like eating anything，being ill for a few days.
(3).有些动词后面既可接不定式，又可接动名词，其意义基本相同，区别不大。如;like，love，hate，delay，continue，attempt(企图)，afford(提供)，prefer.omit(省略)，begin，start.
The Einsteins, however, could not afford to pay for(or：paying for)the advanced education that young Albert needed.
I prefer staying (to stay) at home on Sunday.
注意：begin和start本身为进行时，或后面动词为心理变化意义的动词时，须接不定式。
When we came in, they were beginning to have supper.
After his explanation, I began to understand it / realize that I was wrong.
(4).有些词后面既可以接不定式.亦可接动名词，但其意义有很大区别，须特别注意：
A.remember，forget，regret接动名词，表示完成意义(=having done)，接不定式，表示将来意义：
Please remember to bring me the book I want next time.
I remember seeing her (=having seen her) somewhere before.
Don't forget to write to me soon.
I never forget visiting (=having visited) them for the first time.
I regret missing that good film last week.(后悔干……事)
I regret not taking (not having taken) your advice.
I regret to say I can't take your advice. (遗憾=be sorry)
B.mean：mean to do=want to do打算，想要……;mean doing：意味着，就是
I am sorry, I didn't mean to hurt your feelings，
I meant to call on you, but I was so busy.
Learning a foreign language doesn't mean just working in class.
C.stop：stop to do停下来，要干另一件事，不定式作目的状语;stop doing停止干……，动名词作宾语。
After some time, they stopped walking and had a rest.
After walking some time, they stopped to have a rest.
D.try：try to do，努力，试图干……事;try doing：试着干……事
He searched everywhere and tried to find his key.
He came to the city from the countryside and tried to find a job.
The mother is out and the boy had to try cooking for himself.
They tried to succeed and tried doing their experiments again and again.
E.want，need，require接动名词表示被动意义，表示“需要、该……”;接不定式，表示“想，要干……”
The room wants cleaning.
The bike requires repairing.
These young trees require looking after.
The matter needs thinking over.(=to be thought over)
A Mr. Wang wants to see you.
You don't need to leave so early.
F.go on：go on to do继续干和原来不同的另一件事，不定式作目的状语。
go on doing继续干原来同一件事，动名词作宾语。
After a smoke，he went on telling us that interesting story.
After writing his English composition he went on to work out his maths problems.
G.动词advise，allow，permit，forbid后面接单宾语时用动名词，接复合宾语时用动词不定式。
Doctors advise giving up smoking to benefit one's health.
The doctor advised him to give up smoking so as to improve his health.
She doesn't allow (permit) smoking in her room.=She doesn't allow (permit)anyone to smoke in her room.
Parking is forbidden here.=Any cars not permitted to park here.
3.做宾补：
不定式可以表示一次性、具体性行为，以及将来意义的行为。现在分词可以表示当时正在发生的进行意义的行为，亦可表示-个持续时间的延续性的行为动作。过去分词可以表示完成意义的行为或状态，及物动词的过去分词亦有被动意义，不及物动词的过去分词仍是主动意义。
When I came in, I saw her dancing happily.
I often hear her sing songs in English in her room.
They had the lights burning all night long.
I saw Li Ping pass by and enter the next room just now.
The mother will have the doctor examine her son again.
Tomorrow I'll have my hair cut.
When I got home I found the window broken and the thief gone away already.
When they returned to their hometown, after an absence of twenty years, they found everything changed.
4.做表语：
不定式和动名词做表语解释主语内容，且可以和主语颠倒，意思仍然通顺，回答what的问题。它们有时存在经常性和一次性行为的区别，分词做表语表明主语的性质、特征和状态，不能和主语颠倒，可以回答how的问题。
Her job is cleaning offices.(What is her job?) (Cleaning offices is her job.)
Our job today is to clean the office.(=To clean the office is our job today.)
The news is very exciting.(How is the news?)
They are very tired after a long walk.
The door is locked now.
The children are well dressed these days.
5.做定语：
不定式做定语与先行词有动宾、主谓和解释先行词内容等关系。在时态上常是将来意义，现在分词做定语是现在时或进行时态意义;过去分词做定语则是完成时态意义。此外，不定式做定语时只能后置，不可前置，而单个分词做定语可前置，分词短语做定语则须后置。动名词做定语，须前置，且要重读，它表明先行词的用途。而分词做定语表明先行词的性质、特征和状态。
a swimming boy=a boy who is swimming
a swimming pool=a pool for swimming
the boiling water=the water that is boiling
drinking water=water for drinking
Today I have a letter to write.
Please find a man to help us.
It is a good chance to practise your spoken English.
I like reading books written by Lu Xun.
The woman standing over there is our English teacher.
The house to be built (=which will be built/which is to be built) next year will be our new library.
The house being built (=which is being built) now will be our new library.
The house built (=which was built) last year is our new library now.
6.做状语：
不定式和分词做状语各有不同分工。动词不定式多做目的、结果和原因状语，且多放在句末;分词可以表示时间、原因、条件、让步、方式状语，多置于句首，做伴随状语，多放在后面。单独的动名词不能做状语，在介词后形成介词短语，从而做状语。
(1).目的状语：通常有不定式表示，由于不定式的客观性和将来性特征。不定式前还可加上in order，so as来加强说话的口气。但so as to通常不用于句首。
The Smiths have gone to London to spend their holidays.
I came here (in order/so as) to hear the report.
In order to(不用so as to) see better, we took front seats.
(2).时间状语：分词作时间状语相当于时间状语从句。现在分词作时间状语一般位于句首，表示的动作和谓语动词的动作同时发生，有时现在分词前可以加上时间连词。如果分词动作发生在谓语动词之前，用现在分词的完成体形式。过去分词作时间状语与谓语动词构成同时性和被动意义。分词前有时加上时间连词。
Arriving (=When he arrived) at the bus stop, he found his sister there.
Waiting (=When I was waiting) to see the doctor, I met with a friend of mine.
Having (=When we have) made full preparations, we are ready for an examination.
Having (=When he had) finished his homework, he went to bed.
After finishing his homework, he went to bed.
Seen (=When the town is seen) from the hill, the town looks more beautiful.
Locked (=When he was looked) up in the room, he found himself isolated from the outer world.
When asked to make a speech, he said he was glad to do so.
Once recovered, he went all out to do his work.
(3).原因状语：不定式作原因状语往往用于形容词之后,这些形容词通常是happy, sorry, fortunate, angry, glad, ashamed, discouraged, delighted, frightened, shocked等。分词作原因状语相当于原因状语从句。一般位于句首。
I am sorry to hear that you are not well.
I'm very sorry to have kept you waiting so long.
We are greatly delighted to have a native as our guide.
Being (=Since he was) ill all last year, he lived in a sanatorium.
There being no enough money, he couldn't buy the dictionary that he wanted.
Having (=Since they had) been asked to stay, they couldn't possibly leave right away.
Moved (=As he was moved) by the heroic deeds of the PLA man, he burst into tears.
(4).条件状语：通常用分词来表示，相当于条件状语从句。一般位于句首。
Turning (=If you turn) to the left，you will see the post office.
United (=If we are united), we stand; divided (=if we are divided), we fall.
Given (=If he had been given) more time, he would be able to do better.
(5).结果状语从句：不定式作结果状语通常用于so+形容词或副词+as to，such+名词+as to，too…to，enough to和only to等结构。
现在分词作结果状语表示谓语动词的结果。
He arrived late to find the train gone.
I worked late into the night, only to find I had not finished half of the job.
He was so friendly as to be always helpful to his neighbours.
His is such a sad story as to arouse out sympathy。
I ran faster than ever, reaching the schoolyard quite out of breath.
The man died young, leaving nothing but debt.
(6).让步状语：通常有过去分词来表示，而且前面通常有表示让步意义的though。
Though wounded, the soldier managed to get to the village safely.
Though warned of the danger, he still went skating on the thin ice.
(7).伴随或方式状语：分词作伴随状语通常位于句尾，表示谓语动词正在所处主动或被动的状态。
Chinese businessmen, taxi drivers and students talk with them using English.
She came running towards us.
They walked along the streets, talking and laughing.
He went into the house, followed by some children.
He continued to walk up and down, lost in thought.
篇5：高二英语必背知识点总结
1.一般现在时：
一般现在时大多用动词原形来表示。Behave在人称和数上应按自己的变化规则与主语保持一致。其他动词若其主语是第三人称单数，则应按动词第三人称单数的变化规律变化。
(1)表示主语现在所处的状态及所具备的特征、性格、能力等。 Eg:They are both tired and hungry.
(2)表示习惯性的，反复出现的动作与状态。
常用时间状语：always often sometimes now and then every day
(3)表示客观事实或普遍真理。
Eg:The earth moves around the sun.
(4)在时间状语从句和条件状语从句表示将来的动作。
Eg:If it doesn’t rain tomorrow,we will go climbing.
(5)表示按规定预计要发生的动作，只限于go,come,leave,start,stay,return,begin等。
(6)在某些以have,there开头的`句子中，用动词go,come的一般现在时表示正在发生的动作。
Eg:Here comes the bus!
2.现在进行时：
(1)表示说话时正在进行的动作;
(2)表示即将发生的或按计划安排好的动作，多限于go,come,start，leave,return,arrive,stay,fly等表示运动方向的动词，句中往往有表示将来的时间状语。
(3)少数动词如go,come,leave,arrive,return,begin,do,die,lose等现在进行时可以表示预计即将发生的动作;
(4)表示反复发生的动作。
3.以-ing和-ed结尾的形容词：
以-ed结尾的形容词用来描述人的精神状态或人对事物的态度或感受;以-ing结尾的形容词有“令人......的”意思，常用来指物。
高二上学期英语知识点
表示时间的介词
(1) in表示“在某一时间段”或“在某一时候”，如用在月、季、年份、时代、世纪等时间名词的前面，或用来泛指一天的某一段时间。in也可以指“在……之后”，表示从说话起的若干时间内。
如： in July/summer/20_/ancient times
The bus will be here in ten minutes.
(2) on表示“在特定的某一天”，也可用于带有修饰语的.一天的某个时间段之前。如：on Saturday, on Saturday morning, on the morning of August 1st
(3) at表示“在某一时间点”，或用来表示不确定的时间和短期的假日、时节等。
如：at six o'clock, at Easter
(4) over, through (out)两者均指“经过的全部时间”。
如：Stay over the Christmas.
(5) for与since：for表示动作或状态延续的全部时间长度，为“长达……”之意;since用于指从过去特定的某个时刻到说话时为止的一段时间;含有since时间短语的句子要用完成时，但含有for时间短语的句子不一定要用完成时。
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