全国大众英语测验语法——省to的动词不定式
1）模样形状动词 (除ought外，ought to)：
2）使役动词 let, have, make：
3）感官动词 see, watch, look at, notice , observe, hear, listen to, smell, feel, find等后作宾补，省略to。
留意：在主动语态中则to不能省失落。
I saw him dance.
=He was seen to dance.
The boss made them work the whole night.
=They were made to work the whole night.
4） would rather，had better：
5） Why… / why not…：
6） help可带to，也可不带to, help sb (to) do sth：
7） but和except：but前是动词do时，背面出现的动词用不带to的动词不定式。
8）由and, or和than连接的两个不定式，第二个to可以省往：
9）每每在discover, imagine, suppose, think, understand等词后，可以省往to be：
He is supposed (to be) nice.他应该是个大好人。
举例：
He wants to move to France and marry the girl.
He wants to do nothing but go out.
比较： He wants to do nothing but go out.
He wants to believe anything but to take the medicine.
典范例题
1) ---- I usually go there by train.
---- Why not ___ by boat for a change?
A. to try going B.trying to go C.to try and go D.try going
谜底：D. why not背面接不带to的不定式，因此选D。
2） Paul doesn't have to be made ___. He always works hard.
A. learn B. to learn C. learned D. learning
谜底：B. make后接不带to的动词不定式，当其用于主动时，to不可省略。

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