forget to do和forget doing 的中文意思分别是什么?

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 f...