2014年PETS二级考试:语法讲解(20)

2014-04-17 21:23:00来源:网络

  省to 的动词不定式

  1) 情态动词 ( 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.

  注意:在被动语态中则to 不能省掉。

  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,后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 可以省去:

  9) 通常在discover, imagine, suppose, think, understand等词后,可以省去to be:

  He is supposed (to be) nice. 他应该是个好人。

  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.


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