初中英语知识点-情态动词的用法

英语学习中有许多的知识点需要大家去掌握。其中，情态动词就是一个很重要的知识点，希望同学们认真阅读这篇初中英语知识点-情态动词的用法，认真学习。

一、can/could

1.表示能力时

was/were

able to 具体做成某件事(=managed to do )

could 只表示能够

2.can+感官动词

can taste/ see/ hear/ smell/ feel/ believe/ decide/ understand

3.can表示惊讶、不敢相信

Eg: How can you do like this?

4.cannot but do

cannot choose but do

cannot help but do

Eg: I cannot but feel sorry for her.

I cannot choose but follow her advice.

5.cannot… over/ enough/ too …都不过分;越…越好

Eg: You cannot over praise him.

6.理论上的可能性：

Eg: Accidents can happen on such rainy days.

Anyone can make mistakes.

The temperature can fall to -40℃.

7.can’t 表示否定推测：

Eg: It can’t be him, for he has gone to Paris yesterday.不能用mustn’t

8.can/could 表示允许、请求

Can/May I help you?

I wonder if I can/could do sth.(此处could不表示时态)

-Can/Could/May I use…?

-Yes, you can/may.

-No, you can’t/ may not/ mustn’t.(题目选项中如果表否定允许有mustn’t就选mustn’t)

You’d better not.(may问一般不用may回答)

I’d rather you didn’t.

9.can/could (not) have done

(1)本能做、没能够

(2)过去可能会做、过去不可能做

Eg: He could have killed Harry Potter, but he didn’t.(过去本能够)

He couldn’t have killed him 17 years ago, and he cannot do it now, either.(过去没能够)

Can he have gone to his aunt’s ?(过去可能会做)

He cannot have forgotten it. (过去不可能)

二、may/might

1.may /might 推测性用法 可能

He may be right.

He may not come today (可能不)

He may /might come tomorrow.

注意：只用于肯定和否定句中,不用于疑问句中

2.may not 可能不 can not不可能

He may not come He can’t come

3.may as well最好 may well理应，有足够的理由

You may(might)as well stay where you are.

-Shall we walk?

-We may as well.

4.表祝愿 May you be happy!

5.may (might) + have +done 表示对过去发生行为的推测，也许或许已经做

It may have been true.

He might not have settled the question.

He may not have finished the work.

I think he may have gone to bed.

6.may表示目的

Eg: You must go to bed early so that you can/may catch the train.

7.表示让步

Eg: However hard he may try, he cannot get the first place.

三、must

1. 表示义务意为“必须”(主观意志)

Eg: We must do everything step by step.

You mustn’t talk to her like that.

-Must we hand in our exercise—books now?

-No, you needn’t. / No, you don’t have to.

2.肯定推测(绝对不能用于否定推测!!!!否定推测用can’t/couldn’t)

Eg: He must be ill. He looks so pale.

She’s wearing a diamond necklace. She must have a lot of money.

3.偏要做，偏偏

以上就是这篇初中英语知识点-情态动词的用法的全部内容了，希望大家能在英语学习上取得进步。