课
程
程
资
讯
讯
综
合
合
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。[NextPage] 过去完成时典型例题
The students ___ busily when Miss Brown went to get a book she ___ in the office.
A. had written, left B，were writing, has left C. had written, had left D. were writing, had left
答案D. "把书忘在办公室"发生在"去取书"这一过去的动作之前，因此"忘了书"这一动作发生在过去的过去，用过去完成时。句中when表示的是时间的一点，表示在"同学们正忙于……"这一背景下，when所引导的动作发生。因此
前一句应用过去进行时。
注意：had no … when 还没等…… 就……
had no sooner… than 刚…… 就……
He had no sooner bought the car than he sold it.
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