專門替中國人寫的英語語法9-5：不定詞的簡式

9-5 不定詞的簡式

不定詞中一定要有to，但在有幾個動詞的后面，to又要省掉，最著名的是let，我們絕不可以說:

*I let him to leave.

而一定要說

I let him leave.

我們也不能說

*I made him to work hard.(我使他努力工作)

而一定要說

I made him work hard.

以下的動詞后面，不定詞的后面都要省掉to。

動詞 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.

因為在這些動詞的后面，本來應該用不定詞，僅僅是to被省掉了，因此我們在這些動詞的后面仍然要用原式，以下的句子都是錯的：

*He made his son ran away from home.

*I saw him walked away..

*I have never heard him sang any song.

Help這一個動詞非常特別，它后面的不定詞中的to可省略也可不省，以下的句子都是對的：

I helped him wash his car.

I helped him to wash his car.