You may go out with him.（现在）

He told me I might stay here.（过去）

-May I smoke here?

-Yes,you may.

-No,you may not/had better not/mustn't.

（2）表示可能性，有"或许；可能"之意，might语气更弱。如:

I'm not sure whether I'm coming to the party.I might go to the night school instead.

Let's visit him.He may be at home.

活学巧用

2.单项填空

（1）(2005安徽高考，26) Helen _________ go on the trip with us,but she isn't quite sure yet.

A.shall B.must C.may D.can

提示：海伦可能会和我们一起旅行，但她还不确定。

答案：C

（2）-Are you coming for dinner?

-I'm not quite sure.I _________go to my uncle's instead.

A.must B.would

C.should D.might

答案：D

3.will和would

（1）will表示意愿，用于各种人称。

would表示"过去的意愿"。

如：If you will help me,I will appreciate it.

如果你愿意帮我，我会感激的。

He said he would tell me the truth.

他说他愿意告诉我真相。

（2）will用于第二人称的疑问句时，表示询问对方意愿或向对方提出请求。用would语气比will婉转，指现在时间。如：

Will you do me a favour?

Would you like to have a word with me?

活学巧用

3.单项填空

（1）-_________you lend me your bike?

-Sure.Here is the key.

A.Shall B.Must C.Will D.Does

答案：C

（2）_________you like to have a walk with us this evening?

A.Could B.Will C.Would D.Can

答案：C

（3）When we were young,every evening my brother and I _________stay at home waiting for our mother.