学习英语的帮手就是兴趣，英语有许多的知识是需要记忆的，也是学习英语的基础。下面小编给大家分享一些高中英语重要知识点，希望能够帮助大家!
高中英语重要知识1
疑问代词概说
"疑问代词有who(谁，主格)，whom(谁，宾格)，whose(谁的，所有格)，what(什么)和which(哪个，哪些)等。
疑问代词用于特殊疑问句中
疑问代词一般都放在句首，并在句中作为某一句子成分。如：
Who is going to speak to us tomorrow?明天谁来跟我们讲话?(who作主语)
Who told you so?是谁告诉你的?(who作主语)
Whom are you talking about ?你们在说谁?(whom作宾语，但在句首时口语常用who代替whom)
Whose umbrella is this ?这是谁的伞?(whose作定语)
What is that? 那是什么?(what作表语)
What did he say?他说什么?(what作宾语)
Which is yours，the blue pen or the redone?蓝笔和红笔哪一支是你的?(which作主语)
[注一]关于疑问代词的各种用法，可参看77.70-77.72。
[注二]疑问代词who，what，which等后面加单词ever，可强调语气，表达说话人的各种感情。如：
What ever do you want?你到底想要什么?
Who ever is she looking for ?她究竟是在找谁?
[注三]which表示在一定范围之内的选择，what则没有这种限制。如：
What do you usually have for lunch?你们午饭通常吃些什么?
Which do you like best?你最喜欢哪一个?
Which of you comrades come from the Northeast? 你们同志们中间谁是东北人?
疑问代词可以引导一个间接疑问句
间接疑问句在句中可用作主语、宾语、表语等。疑问代词本身在间接疑问句中又担任一定的句子成分。如：
Who will be in charge of the work is still notdecided.谁将负责这项工作，现在还没有决定。(疑问代词who引导一个主语从句，它本身又在从句中用作主语。)
Do you know what his nameis?你知道他叫什么名字吗?(疑问代词what引导一个宾语从句，而它本身又在从句中用作表语。)
[注一] what所引导的名词性从句(即主语从句、宾语从句、表语从句) 有时不是间接疑问句。如：
What he says is quite true.他所讲的话很对。(what相当于thatwhich。它引导一个主语从句，这个从句不是间接疑问句。)
Children do what the nurse tells them todo.保育员让孩子干什么他们就做什么。(what引导一个宾语从句，这个从句也不是间接疑问句。)
[注二]whatever，whoever，whichever等词可引导名词性从句。这些名词性从句也不是间接疑问句。whatever，whoever，whichever也可引导表示让步的状语从句。见15.65和15.72)如：
They eat whatever they can find.他们找到什么就吃什么。(whatever引导一个宾语从句，并在从句中作宾语。)
I've got plenty of books 1eft.Whoever wants an extra copy can get one fromme.我还剩下许多书，谁还想再要一本可来拿。(whoever引导一个主语从句，并在从句中作主语。)
高中英语重要知识2
关系代词
两种可用来引导从句并将从句和主句连接起来的代词
这样的代词一方面在从句中用作句子成分，可作主语、宾语、定语等;另一方面又起连词的作用。这样的代词有关系代词和疑问代词两种。
关系代词概说
关系代词有who，whose，whom，that，which等，用来引导定语从句。它们在定语从句中可用作主语、宾语、定语或表语;另一方面它们又代表主句中为定语从句所修饰的那个名词或代词(这样的名词和代词叫做先行词)。如：
The man who is talking with Mr. Brown is an eyeSpecialist和布朗先生谈话的那个人是个眼科大夫。(关系代词who在从句中用作土语，它的先行词是man)
He is the comrade whom you have been lookingfor他就是你要找的那位同志。(关系代词whom在从句中作宾语，它的先行词是comrade，whom在口语中一般可省去)
The old man whose son is in the navy used to becarpenter.儿子在海军的那位老人过去是个木匠。
(关系代词whose在从句中用作定语，先行词为man)
The film which I saw last night is about a youngteacher.我昨晚看的那部电影说的是一个年轻教师的事。(关系代词which在从句中用作宾语，先行词为film, which在口语中可省略)
This is the plane that will fly to Tokyo in theafternoon.这是下午要飞往东京的飞机。(关系代词that在从句中用作主语，先行词为plane)
高中英语重要知识3
不定代词的用法
不定代词大都可代替名词和形容词，在句中可用作主语、宾语、表语和定语。如：
1.用作主语
Both of them are waiters.他们俩人都是男侍者。
Is everybody here?人都到了吗?
2.用作宾语
I know little about the novel关于这本小说我知道的很少。
I am speaking for myself，not for others.我只代表自己，不代表别人发言。
I was interested in everything that the old man toldme.我对于这位老人告诉我的一切都感兴趣。
3.用作表语
That's all for today. class is dismissed.今天就讲这一些。现在下课。
This book is too much for me.这本书对我说太难了。
4.用作定语
Study well and make progress every day.好好学习，天天向上。
He has some English books.他有一些英文书。
china will become a powerful modern country in another twentyyears.再过二十年中国将成为现代化强国。
[注]有些不定代词也可用作同位语和状语。如：
Wang and Li both made good progress.王和李两人都有很大进步。
They all went to the Zoo.他们都去动物园了。
Are you any good at mathematics?你数学好吗?
The meeting lasted some two hours.会议进行了两个小时左右。
高中英语重要知识4
would rather that somebody did…"宁愿……;更愿意……"(表示现在或将来的愿望)
would rather that somebody had done…"宁愿……;更愿意……"(表示过去的愿望)
[例句]
I'd rather you posted the letter right now. 我想让你现在去寄信。
I'd rather you were not a celebrated actor. In that case, we could spendmore time together.
我到情愿你不是个知名演员，这样我们可以有更多的时间在一起。
I'd rather that I hadn't seen her yesterday. 我情愿昨天没有看到她。
句型2
as if/though+主语+did/had done…好像……(表示现在或将来的情况用过去时;表示过去的情况用过去完成时)[参考句型4]
[例句]
Our head teacher treats us as if we were her own children, so all thestudents in our class think highly of her.
Alan talked about Rome as if he had been there. Alan谈起罗马来就好像他去过那里似的。
句型3
"wish +宾语从句"，表示不大 可能实现的愿望
表示现在的愿望：主语+过去时;
表示过去的愿望：主语+had done;
表示将来的愿望：主语+would/could do
[例句]
How I wish we students had more free time to relax ourselves!我们学生多么希望有更多的自由时间放松自己!
I failed in the maths exam. How I wish I hadn't wasted so much timeplaying!
What a pity you can't go to the party. How I wish I could dance with you atthe party!
句型4
It's high/about time that somebody did (should do) (should通常不省略) …早就该……
[例句]
It's time that you went to school.= It's time that you should go toschool.
It's high time that we did something to improve our environment.该是我们为环保做些事情了。
I think it's high time that she made up her mind. 我想她该拿定主意了。
句型5
情态动词+动词不定式完成结构的用法
could have done "本来可以……"(表示过去没有实现的可能)。
might have done "本来可能……;本来应该或可以做某事"(实际没有发生;含有轻微的责备语气。
should/ought to have done "本来该做某事"(而实际未做)
should not/ought not to have done "本来不该做"(实际却做过了，含有责备语气)
needn't have done "本来不必做"(但是已经做过了)
would rather have done "当时宁愿做了某事"(实际没有做过);否定式would rather not havedone表达相反意思，两者都有表示"后悔"之意。
句型6
as, though, although引导的让步状语从句。
[注意]although位于句首;though位于句首或句中;as位于句中=though。它的词序是把句中强调的形容词、副词、动词或名词放在连词前。[参考倒装结构]请注意下列句式的变化：
[例句]
1. Although/Though I'm young, I already know what career I want tofollow.
→Young as/though I am, I already know what career I want to follow.
我虽然年轻，但我已经明白我应该追随什么样的事业。
2. Although/Though I respect him very much, I cannot agree with hisidea.
→Much as/though I respect him, I cannot agree with his idea.虽然我很尊重他，但是我不同意他的观点。
3. Although/Though he is a child, he knows a lot of Chinese characters.
→Child(省略冠词)as/though he is, he knows a lot of Chinese characters.他虽然还是个孩子，却认识了许多汉字。
4. Although he tried, he couldn't solve the problem.
→Try as he might, he couldn't solve the problem. 尽管他努力了，但是他没有解决问题。
5. Although it is raining, I'm going out for a walk.
→Raining as it is, I'm going out for a walk. 天虽然在下雨，我还是要出去散步。
6. Strange as it may seem, nobody was injured in the accident.这次意外虽然显得不可思议，却没有人受伤。
7. Much as I would like to help, I have a lot to do.虽然我很想帮助你，但是我有很多事要做。
8. Object as you may, I will go. 纵使你反对，我也要去。
句型7
…before…特殊用法(1)"没来得及……就……"
[例句]
The roof fell before he had time to dash into the room to save hisbaby.
他还没有来得及冲进房间救孩子，房顶就塌了。
He ran off before I could stop him. 我还没有来得及阻止，他已经跑了。
To my great disappointment, my favorite singer left the concert before Icould have a word with her.
让我非常失望的是，我还没有来得及和我最喜欢的歌手打招呼，她就已经离开了。
句型8
…before…特殊用法(2)"过了多久才……"或"动作进行到什么程度才……"
[例句]
They walked about fifty miles to the west before they saw a village.
他们西行50英里才看到一个村庄。
The workers worked day and night about three days before everythingreturned to normal.
工人们连续工作3天才使一切恢复正常。
He almost knocked me down before he knew it.
他几乎撞到我了才意识到。
We had walked a long way before we found some water.
我们走了很长的路才找到一点水。
Five years went by before I knew it. 不知不觉，五年过去了。
句型9
It was + 时间段+before…."过了多久才(怎么样)……"
It was not long before…."不久，就……"
It will (not) be +时间段+before…."要过多久(不久)……才……"(before从句谓语动词要用一般时态)
[例句]
It was not long before he sensed the danger of theposition.不久他就意识到他处境的危险。
It was five days before he came back. 五天后他才回来。
It will be half a year before you graduate from the school. 再过半年你才能毕业。
It will not be long before they understand each other. 他们大概不久就会互相了解。
句型10
in case of…(+n.) "以防;万一";
in case that…"以防，万一……"(谓语动词用一般现在时态或should+动词原形)
[例句]
In case of fire, what should we do?
Please remind me about it in case I forget/should forget. 万一我忘了，请提醒我。
In case (that) John comes/should come, please tell him to wait.
Please take your umbrella in case (that it rains/shouldrain).带上雨伞，以防下雨。
高中英语重要知识5
一. 直接引语和间接引语
(一)直接引述别人的原话，叫做直接引语;用自己话转述别人的话，叫做间接引语。间接引语一般构成宾语从句。直接引语必须放在引号内，间接引语则不用引号。直接引语改为间接引语时，除将引语部分变成宾语从句外，还必须对直接引语中的人称、时态、指示代词、时间状语、地点状语等进行改变。
1. 时态的变化：直接引语变为间接引语时，通常受转述动词said,asked等的影响而使用过去化的时态，即把原来的时态向过去推，也就是一般现在时变为一般过去时，现在进行时变为过去进行时，等等。例如：
Tom said to me,“My brother is doing his homework.”
→Tom said to me that his brother was doing his homework.
2. 人称代词、指示代词、时间状语、地点状语等等的变化： 根据意义进行相应的变化，例如：
She asked Jack,“Where have you been?”
→She asked Jack where he had been.
He said,“These books are mine.”
→He said that those books were his.
(二)直接引语改为间接引语时，都使用陈述语序，但是因为原句的句式不同，所以变成间接引语时所用的连词会有所不同。直接引语如果是一般疑问句，用连接词whether或if;如果是特殊疑问句，则用疑问词引导间接引语。转述的动词一般用asked，可以在其后加上一个间接宾语me,him, her, us等。如：
She said,“Is your father at home?”
→She asked me if/whether my father was at home.
“What do you do every Sunday?”My friend asked me.
→My friend asked me what I did every Sunday.
直接引语如果是祈使句，改为间接引语时，要将祈使句的动词原形变为带to的不定式，并在不定式的前面根据原句的语气(即请求或命令)加上ask, tell,order等动词，如果祈使句为否定式，则在不定式前加not。其句型为：ask / tell / order someone (not) to dosomething. 例如：
She said to us,“Please sit down.”
→She asked us to sit down.
He said to him,“Go away!”
→He ordered him to go away.
He said, “Don’t make so much noise, boys.”
→He told the boys not to make so much noise.
二. 各种时态的被动语态
被动语态概述
被动语态的概念：它是动词的一种形式，表示主语与谓语之间的执行或被执行关系。主动语态表示主语是谓语动作的执行者，例如：They saw thelittle boy crying by the river. 被动语态表示主语是谓语动作的承受者，例如：The little boy was seencrying by the river.
被动语态的构成
被动语态的形式是由“助动词be+动词的过去分词”构成。助动词be随着主语的人称、数、时态等的不同而变化。几种常见时态的被动语态形式如下：
1. 一般现在时 am/is/are + 过去分词
例如：Rice is planted in the south of China.
2. 一般过去时 was/were + 过去分词
例如：These trees were planted the year before last.
3. 一般将来时 will/shall + be + 过去分词
例如：A sports meeting will be held next week in our school.
4. 现在进行时 am/is/are + being + 过去分词
例如：Your radio is being repaired now.
5. 过去进行时 was/were + being + 过去分词
When he got there, the problem was being discussed.
6. 现在完成时 have/has + been + 过去分词
His work has been finished.
Has his work been finished? Yes, it has. / No, it hasn’t.
7. 过去完成时 had + been + 过去分词
注意：
1.除了be之外的其它系动词如get, stay等也可以和过去分词构成被动语态。例如：Their questions haven’t gotanswered.
2. 含有情态动词的谓语变成被动语态使用“情态动词+ be + 过去分词”结构。例如：
More attention should be paid to the old in this country.
This work can’t be done until Mr. Black comes.
3. 含有“be going to”, “be to”等结构的谓语，其被动语态分别用“be going to + be + 过去分词”和“be to+ be + 过去分词”。例如：
The problem is going to be discussed at the next meeting.
All these books are to be taken to the library.
4.被动语态与系表结构的区别：“连系动词+用作表语的过去分词”构成的系表结构，与被动语态的形式完全一样，所以应注意它们的区别。被动语态中的过去分词是动词，多强调动作;系表结构中的过去分词相当于形容词，多强调状态。前者通常可用by引出动作的执行者，而后者则不可以。例如：
The map was changed by someone.(被动结构)
That custom remained unchanged for many centuries.(系表结构)
系表结构中的过去分词通常可被very修饰，被动语态中的过去分词往往要用much修饰。
例如：
He was very excited.(系表结构)
He was much excited by her words.(被动结构)
5. 主动形式表被动意义。有些动词的主动形式有被动意味，如 open, read, sell, shut, wash, wear,write等。此时句子的主语一般是物。例如：
These books sell well. 这些书很畅销。
The door won’t shut. 这门关不上。
The clothes wash well. 这些衣服很好洗。
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