2023考生必背高考英语知识点归纳总结

2023考生必背高考英语知识点归纳总结

高中英语必背知识点归纳

1、情态动词与助动词

1、can能，可以，表说话人同意，许可还可表客观条件许可，如:You can go now.

提建议或请求时可用can I, can you表客气，如Can I buy you a drink?

can和be able to表能力时的区别。

can表一般具有的能力，be able to表在特定条件下的能力，如:Although the driver was badly hurt,he wasable to explain what had happened.

2、may

(1)可以，表说话人同意，许可或请求对方许可。You may go.

(2)(现在和将来)可能，也许，只用于肯定句和否定句中，如He may not be right.

3、must,have to

must表主观上的必须，have to表客观上的必须，如:It#39;s getting late. I have to go. -Must I go now.-Yes,you must.(No, you needn#39;t./ No, you don#39;t have to.)

4、need,dare这二词有实意动词和情态动词两种词性，如用作实意动词后接动词不定式to do，如用作情态动词后接动词原形。Need I go now? --Yes, you must./No, you needn#39;t.)

5、shall用于第一人称疑问句中表说话人征求对方的意见或向对方请求，如，Shall we begin our lesson?用于二、三人称陈述句，表说话人命令、警告、允诺、威胁等口吻，如: You shall fail if you don#39;t workharder.

6、should表应该，意为有责任，有义务。如:We should try our best to make our country more beautiful.

7、will表有做某事的意志、意愿、安心、打算，如Will you lend me your book? Yes, I will.

8、should have done表应该做而未做

must have done表对过去事实的肯定推测

could have done表本可以做某事

9、判断句：肯定句用must,否定句用can#39;t,不太肯定用may,might

He must be in the office now.

He must have gone to bed, for the light is out.

He can#39;t be in the office. He is at home.

He couldn#39;t have cleaned the classroom, because he didn#39;t come here today.

He might be in the office, I am not sure.

He might have cleaned the room, I suppose.

2让步状语从句1、though,although,as的区别

A、Though,although的主句中可以用yet, still, nevertheless,但不可使用but。

B、though引导的从句可以倒装，也可以不倒装;as引导的从句必须倒装;although引导的从句不能倒装。其结构为：形容词/分词/副词/动词原形/名词(无冠词)+as/though+主语+谓语……

2、though可用作副词，放在句末，意为“不过，但是”。Although无此用法。

3、某些短语也引导让步的从句或短语，意为“尽管”，如：in spite of the fact that, despite

the fact that,regardless of(the fact that)

句子种类

1、陈述句的否定

(1)在含有宾语从句的主从复合句中，当主句的谓语动词是think, expect, believe, suppose, guess, fancy,imagine等，且主句主语是第一人称时，宾语从句谓语的否定习惯上要移到主句谓语上，如: I don#39;t think he is right.

(2)含有否定意义的副词never, seldom, hardly, scarcely, rarely, barely的句子应视为否定句，如: I have never been there before.

2、反意疑问句

(1)need和dare既可作情态动词，又可作实意动词，在反问部分须加以区别，如We needn#39;t leave, need we? We don#39;t need to leave, do we?

(2)陈述部分出现否定意义的副词或代词如never, seldom, few, hardly, little等时，反问部分须用肯定形式，如：He seldom comes, does he?

(3)陈述部分用不定代词作主语时，反问部分的主语用it，如：Nothing can stop me, can it?

陈述部分用everybody, everyone, somebody, someone，等作主语时，反问部分常用it，有时也用they，如:Everybody knows that, don#39;t they?

(4)陈述部分包括used to时，反问部分可有两种形式，如: You used to get up early, usedn#39;t (didn#39;t) you?

(5)陈述部分是there + be结构时，反问部分用there，如:There#39;s something wrong with you, isn#39;t there?