初中英語語法：regret doing/to do

regret to do　 對要做的事遺憾?！　　　　?未做)
    regret doing　 對做過的事遺憾、后悔?！　?已做)
    i regret to have to do this, but i have no choice.
    我很遺憾必須這樣去做，我實在沒有辦法。
    i don't regret telling her what i thought.
    我不為告訴她我的想法而后悔。
    典型例題
    ---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. 對已發(fā)生的事感到遺憾。regret to do sth. 對將要做的事感到遺憾。本題為對已說的話感到后悔，因此選d。