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(shí)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。

　　try to do　　努力，企圖做某事。

　　try doing　 試驗(yàn)，試著做某事。

　　You must try to be more careful.

　　你可要多加小心。

　　I tried gardening but didn't succeed.

　　我試著種果木花卉，但未成功。

　　go on to do　做了一件事后，接著做另一件事。

　　go on doing　 繼續(xù)做原來做的事。

　　After he had finished his maths，he went on to do his physics.

　　做完數(shù)學(xué)后，他接著去做物理。

　　Go on doing the other exercise after you have finished this one.

　　作完這個(gè)練習(xí)后，接著做其他的練習(xí)

　　cease to do　 長時(shí)間，甚至永遠(yuǎn)停做某事。

　　cease doing　 短時(shí)停止做某事，以后還會(huì)接著做。

　　That department has ceased to exist forever.

　　那個(gè)部門已不復(fù)存在。

　　The girls ceased chatting for a moment when their teacher passed by.

　　姑娘們在老師走過時(shí)，停了會(huì)聊天。

　　mean to do　 打算、想

　　mean doing　意味著

　　I mean to go, but my father would not allow me to.

　　我想去，但是我父親不肯讓我去。

　　To raise wage means increasing purchasing power.

　　贈(zèng)加工資意味著增加購買力。