原形不定词.和不原形不定词.是什么啊...

Question

原形不定词.和不原形不定词.是什么啊...

Answer 1

原形不定式
1.原形不定式是不加to的不定式.
2.原形不定式用在助动词后；ought,used除外.
It can't be true.
这不可能是真的.
You ought to tell me.
你应该告诉我.
3.原形不定式用在感官动词see,hear,feel,watch,look at,listen to后,但在它们的被动语态中要用带to的不定式或现在分词.
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.
She was heard singing a good song.
有人听到她正在唱一首好歌.
4.原形不定式用在使役动词let,make,help,have后,但在它们的被动语态中,要用带to的不定式.
He made us laugh.
他使我们笑.
We were made to laugh.
我们被弄笑了.
5.原形不定式的惯用法.【参见感官动词,使役动词】
You had better finish your homework.
你最好完成你的功课.
I would rather stay at home than go to the movies.
我宁愿在家里也不愿去看电影.
All that we do every day is study.
我们每天做的只是研读.