情态动词

must

1.表推测 :肯定,一定 

You must be the new teacher.

It must have rained last night.

She must have cried just now.

2.表示不可避免的义务:必须

You must do it.(=have to)

may

1.表示推测:可能

The play may begin at any moment.

It may have began already.

2.表请求允许:可以吗?(第一人称)

May I do sth.

3.表示允许:可以

You may come in and have something to drink.

might

1.may 的过去式

2.用于现在时,是一种更加委婉的表述

may/might ...as well:    不妨...;不如...

This TV program is quite boring.We may/might listen to the music as well.

can

1.表示能力:能够

Trust yourself ! you can do it.

2.表示请求允许:可以吗?

3.表示允许:可以

4.表示推测(否定):不可能

He is abroad, It can't be him.(couldn't)

could

1.can 的过去式

2.用于现在时,是一种更加委婉的表述

Could you help me?

8月27日暖言:不与任何人竞争,只要自己不断前进即可。

图片发自App

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