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高考英语情态动词讲解

高考英语情态动词讲解
高考英语情态动词讲解

(一)情态动词常考点(一)表能力

如:I am starving to death。I can eat two bowls of rice now。

(现在的能力)我快饿死了,现在我能吃两碗米饭。

但是每个

1.可能性可分为客观的可能性和具体事情实际发生的可能性两种。所谓客观的(理论的)可能性即并不涉及具体某事是否会发生,此种用法常常可以说明人或事物的特征。情态动词can可用于肯定句中表示客观的(理论的)可能性,而表示具体事情实际发生的可能性时,can一般不用于肯定句。如:

Accident can happen on such rainy days。

他现在可能在回家的路上。

Can this be done by him?(表示疑惑、惊讶)这可能是他做的吗?

(三)表请求、允许、允诺

1.当对方是决策者时,你代表你(们)自己(I,we)或代表第三者(he,she,they)向对方(you)请示或提出建议时用:①Shall I(we)…?②Shall he/ she/ they…?③Would/ Will you…?如:Shall we begin our class?

2.

—Yes,of course you can。

3.当你自己(I)是决策者,给对方(you)或第三者(he,she,they)以命令、警告、允诺或威胁时,要用shall。此外,当宣布法律、规定时,也要用shall。如:

You shall leave the room at once,and he also shall。(= I order you and him to leave the room at once。)

今天下午我应该去看望他,但我不知道我是否有空。(表示将来的必要性)

You should have come to the conference yesterday。What was the reason for your absence?

你昨天应该参加那个会议。你缺席的原因的是什么?(表示过去的必要性)

(六)情态动词其他用法要点

1.cannot but + do sth.表示“不得不,只好”。如:

4.may可以用于祈使句,表示祝愿。如:

May we never forget each other。

愿我们彼此永不相忘。

May you return in safety。

5.。如:

6.

—If you must know,I’m twice my son’s age。

——夫人,您多大了?

——如果你硬要知道的话,我是我儿子年龄的两倍。

7.may作“可以”讲时,其否定式常用“mustn’t”表示“禁止”;must作“必须”讲时,其否定

He needn’t do that。

(情态动词)他不必那么做。

He doesn’t need to do it。

(行为动词)他不必做它。

(详见“非

The floor needs sweeping。

这地需要打扫了。

易错知识总结

(一)易混点归纳

他可能上学去了。

He must have gone to school。

他肯定是上学去了。

He may/ might not have gone to school。

2.

3.needn’t + have done可用来表示“已做了不必做的事”。如:

There is no school today。You needn’t have come。

4.could + have done可用来表示没做某事的遗憾。如:

She came here on foot,but she could have come by bus。

他会不会还在考虑我告诉他的那件事呢?

2.may后面接进行时表示可能正在发生的动作。如:

Your mother may be waiting for you to return home。

你妈妈可能正等着你回家呢。

3.

她或许因为受了冤枉还在哭。

You might be telling me a lie。

你也许在对我撒谎。

4.must后面接进行时表示想必正在做某事。如:

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