原形不定词

1.原形不定词是无to的不定词,即原形动词。

2.原形不定词用在助动词后。

It can't be true.

这不可能是真的。

You should read the rules carefully.

你们要仔细阅读这些规则。

3.原形不定词用在感官动词see, hear, feel, watch, look at, listen to后作受词补语,但在它们的被动语态中要用带to的不定词,作主词补语。

I heard her sing a good song.

我听到她唱一首好歌。

She was heard to sing a good song.

有人听到她唱一首好歌。

4.原形不定词用在使役动词let, make, help, have后作受词补语,但在它们的被动语态中,要用带to的不定词作主词补语。

He made us laugh.

他逗我们发笑。

We were made to laugh.

我们被逗笑了。

5.原形不定词的习惯用法。

You had better finish your homework.

你最好完成你的功课。

had better后要求接原形不定词。

I would rather stay at home than go to the movies.

我宁愿在家里也不愿去看电影。

would rather...than...后都要求原形不定词。

All that we do every day is study.

我们每天做的只是研读。

主词部分有一个表示动作的动词do时作主词补语的不定词通常多用原形不定词。