to 可以用作介词,也可用作不定式的标示。下面的to 都用作介词:
admit to object to be accustomed to be used to stick to turn to开始
look forward to be devoted to pay attention to contribute to apologize to devote oneself to
7.9 省去to 的动词不定式
1) 情态动词 ( 除ought 外) 后。
2) 使役动词 let, have, make后,感官动词 see, watch, look at, notice , observe, hear, listen to, smell, feel, find 等后。
注意:被动语态中不能省去to。例如:
I saw him dance. 我看见他跳舞。
=He was seen to dance.
The boss made them work the whole night. 老板让他们整夜干活。
=They were made to work the whole night.
3) would rather,had better句型后
4) Why / why no句型后
5) help 后可带to,也可不带to, help sb (to) do sth:
6) but和except后。but前是实义动词do时,后面出现的不定式不带to。
比较:He wants to do nothing but go out. 他只想出去玩。
He wants to believe anything but to take the medicine. 除了吃这药,他什么都信。
7) 由and, or和than连接的两个不定式,第二个to 可以省去:
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2016-02-29
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