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
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
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.
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.
4.there be 非谓语动词的用法
The students expected there to be more reviewing classes before the final exams.(expect要求接不定式做宾语)
(2)做目的状语或程度状语时用for there to be，做其他状语用there being。如：
For there to be successful communication, there must be attentiveness and involvement in the discussion itself by all present. (for there to be…在句中做目的状语)
It isn’t cold enough for there to be a frost tonight, so I can leave Jim’s car out quite safely.
(for there to be…在句中做程度状语)
There being no further questions, we’ll stop here today. (there being…做原因状语)
(3)引导主语用for there to be。如：It is unusual for there to be no late comers today.
He would always ignore the fact of there being such a contradiction in his inner thought.