情态动词

2020-01-26  本文已影响0人  OpenFire_674f

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情态动词

常见情态动词

can, could, may, might, must, have to, need, should, ought to

表可能

might < may < could < can < should < must

表许可

might < may < could < can

表义务

should < must

That might be Tom. 那人也许是汤姆。
That must Tom. 那人一定是汤姆。
That is Tom. 那人是汤姆。

can/could

I can do it.
She could do it when she was five years old.

It can't be true.
The book could be John's.

Can/Could I use your phone?

may/might

It may/might be true.

May/Might I use your phone?

- May I come in? 我可以进来吗?
- Yes, you may. 是的,你可以。
- No, you mustn't / you'd better not. 不,你一定别/你最好不要。

should

You should help her.

The film should be very good.

will/wuold

表“将”。

Will you lend me your car? 你将把你的车借给我吗?
He will pick you up tomorrow morning. 她明早将要去接你。
I will help you if I'm free this afternoon. 如果我下午有空,我将帮助你。
If my brother will play this toy, I will give it to him. 如果我弟弟将要玩这个玩具,我就会把它给他。

must

have to也表示必须,倾向于客观原因。

You must finish it tonight.

It must be John's book.

- Must Lucy finish her work today? 今天露西必须完成她的工作吗?
- Yes, she must. 是的
- No, she needn't / don't have to. 不,他不需要/不需要。

need

表“需要,必须”。

肯定回答must,否定回答need notdon't have to

- Need I stay here any longer? 我还需要待在这里吗?
- Yes, you must. 是的,你必须。
- No, you needn't/don't have to. 不,你不需要。
Your parents needn't be worried. 你的父母不需要担心。
Jack need have finished the task by himself. 杰克本来需要自己完成这个任务的。
Lucy don't need to wait for me this night. 露西今晚不需要等我。
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