第九章 动词如何转换成名词

9-5 不定词的简式

不定词中一定要有to，但在有几个动词的后面，to又要省掉，最著名的是let，我们绝不可以说:

*I let him to leave.

而一定要说

I let him leave.

我们也不能说

*I made him to work hard.(我使他努力工作)

而一定要说

I made him work hard.

以下的动词后面，不定词的后面都要省掉to。

动词 例句

let My mother let me watch TV tonight.

make He makes his students respect teachers.

have He had his sons clean their rooms.

see I saw him run away.

hear I heard the birds sing.

watch I watched the kids play.

notice I noticed her cry.

因为在这些动词的后面，本来应该用不定词，仅仅是to被省掉了，因此我们在这些动词的后面仍然要用原式，以下的句子都是错的：

*He made his son ran away from home.

*I saw him walked away..

*I have never heard him sang any song.

Help这一个动词非常特别，它后面的不定词中的to可省略也可不省，以下的句子都是对的：

I helped him wash his car.

I helped him to wash his car.