8.3 remember doing/to do
        
        　remember to do 记得去做某事　　　　 (未做)
        　remember doing　记得做过某事　　　 (已做)
        
        Remember to go to the post office after school.
        记着放学后去趟邮局。
        Don’t you remember seeing the man before?
        你不记得以前见过那个人吗?
        8.4 regret doing/to do
        
        regret to do　 对要做的事遗憾。　　　　　(未做)
        regret doing　 对做过的事遗憾、后悔。　　(已做)
        　　I regret to have to do this, but I have no choice.
        我很遗憾必须这样去做，我实在没有办法。
        　　I don’t regret telling her what I thought.　
        我不为告诉她我的想法而后悔。
        
        典型例题
        ---You were brave enough to raise objections at the meeting.
        ---Well, now I regret ___ that.
        A. to do　 B. to be doing　 C.　to have done　 D.　having done
        答案：D。regret having done sth. 对已发生的事感到遗憾。regret to do sth. 对将要做的事感到遗憾。本题为对已说的话感到后悔，因此选D。