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mean to do想要(做某事) propose to do 打算(做某事)
mean doing意味(做某事) propose doing建议(做某事)
forget to do忘记(要做的事) remember to do记得(要做某事)
forget doing忘记(已做的事) remember doing记得(已做过的事)
go on to do继而(做另一件事) stop to do停下来去做另一件事
go on doing继续(做原来的事) stop doing停止正在做的事
regret to do(对将要做的事)遗憾 regret doing(对已做过的事)后悔
如：
Mr. Jankin regretted having blamed his secretary for the mistake, for he later discovered it was his own fault.
The boy is constantly being told not to scratch the paint off the wall, but he goes on doing it all the same.
2.不定式的习惯用法
句型：cannot help but do cannot but do
cannot choose but do can do nothing but do
have no choice/alternative but to do
上述句型的意思接近，即"不得不做"、"不禁做"、"不由自主地做"、"不能不做"、"只能做"。其共同的特点是都有一个否定词和but。如：
Nobody can help but be fascinated by the world into which he is taken by the science fiction.When I consider how talented he is as a painter, I cannot help but believe that the public will appreciate his gift.
3.动名词的习惯用法
句型：be busy/active doing sth. have difficulty/trouble/problem doing sth.
It's no good/use/picnic doing sth. have a good/great/wonderful time doing sth.
spend/waste time doing sth. There is no point/sense/harm/ use doing sth.
cannot help doing sth. There is no doing sth.
I know it isn't important but I can't help thinking about it.
Alice was having trouble controlling the children because there were so many of them.
There is no use crying over spilt milk.
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