41) need的用法

1.need作实义动词，意为"需要"。如：

Do you need to stay at home?你要呆在家里吗?

2.need作情态动词，一般用于对must的否定回答。如：

---Must he leave now?他必须离开吗?

---No, he needn’t.不，他不必。

3.区分：

a.need作实义动词。

He needs to go.

He doesn’t need to go.

Does he need to go?

Yes, he does./No, he doesn’t.

b.need作情态动词，一般不用于肯定句。

He needn’t go.

Need he go?

Yes, he need./No, he needn’t.