8.2forget doing/to do-特别词精讲
8.2 forget doing/to do
forget to do忘失落要往做某事，forget doing忘失落做过某事。例如：
The light in the office is stil on. He
forgot to turn it off.办公室的灯还在亮着，他忘失落关了。（没有做关灯的举措）
He forgot turning the light off.他忘失落他已经关了灯了。（已做过关灯的举措）
典范例题
---- 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
谜底：C。由the light is still on可知灯亮着，即关灯的举措没有发作，因此用forget to do sth.而forget
doing sth默示灯已经打开了，而忘失落了这一毕竟。此处不符合题意。

关键字：regret to do doing to do to doing try doing to do mean doing to do 特别疑问词 to do