forget doing/to do


  8.2 forget doing/to do

  forget to do忘记要去做某事。(未做)

  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。 ( 已做过关灯的动作)

  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。