2015教资国考

【动词不定式】

形式：to+动词原形

特点：无人称和数的变化在句中不能作谓语可以有自己的宾语或状语，构成不定式短语。

1、在begin/hope/start/wish/want/decide等词之后一般用动词不定式作宾语，而在ask/tell/invite/order/help等词之后一般用动词不定式作补足语。Help后可省略to.

例如：

He wants to buy an English dictionary.

Please ask him not to be late again.

Please help mecarry the box, will you?

2、在see/hear/watch/notice/let/make/have/feel等感观动词或使役动词后作宾语补足语的动词不定式，一般要省略to.

例如：The boss made him do heavy work.

注意：上述动词用于被动语态时，to要还原。

例如：He was made to do heavy work by the boss.

在上述动词的后面可用现在分词作宾补，但用现在分词和动词不定式所表示的意思不同。

I saw the boy climb the wall.我看见小孩爬墙了。。

I saw the boy climbing the wall.我看见小孩正在爬墙。

3、had better/why not +省略to 的动词不定式。

4、动词不定式常与特殊疑问句连用。

He did not know when to start.

We did not know how to get there.