大学英语四级语法大全之forget doing/to do

8.2 forget doing/to do

forget to do　忘记要去做某事。　(未做)

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forget doing　忘记做过某事。　　(已做)

The light in the office is stil on. He forgot to turn it off.

办公室的灯还在亮着，它忘记关了。(没有做关灯的动作)

He forgot turning the light off.

他忘记他已经关了灯了。　　　 ( 已做通过灯的动作)

Don't forget to come tomorrow.

别忘了明天来。　　　　　　　　 (to come动作未做)

典型例题

---- The light in the office is still on.

---- Oh，I forgot___.

A. turning it off　 B. turn it off　 C. to turn it off　 D. having turned it off

答案：C。由the light is still on 可知灯亮着，即关灯的动作没有发生，因此用forget to do sth.

而forget doing sth表示灯已经关上了，而自己忘记了这一事实。此处不符合题意。

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