［特殊词精讲］regret doing/to do

　　regret to do　对将要做的事遗憾，regret doing　对做过的事遗憾、后悔。例如：

　　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 dont 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.