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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。

try to do　　努力，企图做某事。

try doing　 试验，试着做某事。

You must try to be more careful.

你可要多加小心。

I tried gardening but didn't succeed.

我试着种果木花卉，但未成功。

go on to do　做了一件事后，接着做另一件事。

go on doing　 继续做原来做的事。

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

做完数学后，他接着去做物理。

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

作完这个练习后，接着做其他的练习

cease to do　 长时间，甚至永远停做某事。

cease doing　 短时停止做某事，以后还会接着做。

That department has ceased to exist forever.

那个部门已不复存在。

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

姑娘们在老师走过时，停了会聊天。

mean to do　 打算、想

mean doing　意味着

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

我想去，但是我父亲不肯让我去。

To raise wage means increasing purchasing power.

赠加工资意味着增加购买力。

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