【例如】
I remembered putting my wallet in the bag, but I could not find it.
regret to do：遗憾做某事，经常用：regret to say
【例如】
I regret to say that I can't accept your invitation.
regret doing：后悔做过某事。
【例如】
I regret notshavingstaken your advice.
try to do：尽力做某事。
【例如】
One should try to do everything well.
try doing：试着做某事。【例如】
I tried cooking, but I failed.
3)动名词作介词宾语
动名词作介词宾语，并且和介词构成介词短语。
【例如】
She left without saying anything to us.Man's dream of landing on the moon came true in1968.I am afraid of being punished by the teacher.Ann never dreams of ____for her to be sent abroad very soon.(CET-4 1998,6)
A) there being a chance B) there to be
C) there be a chance D) being a chance
of为介词，后面接动名词做宾语，因此B和C都可以排除。另外，根据句意：安妮从来没有梦想过她有一个很快被送出国的机会，介词后面含有“有”的意思，用there be结构表达，故正确答案为A.
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