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[小升初语法] [动词不定式]省去to 的动词不定式

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  1) 情态动词 ( 除ought 外) 后。

  2) 使役动词 lethavemake后,感官动词 seewatchlook atnoticeobservehearlisten tosmellfeelfind 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 ratherhad better句型后

  4) Why / why no句型后

  5) help 后可带to,也可不带tohelp sbtodo sth

  6) butexcept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andorthan连接的两个不定式,第二个to 可以省去:

  8) 通常在discoverimaginesupposethink等词后作宾补时,可以省去to be.例如:

  He is supposedto benice. 他应该是个好人。

  典型例题

  1)I usually go there by train.

  ---- Why not ___ by boat for a change? 

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