fforget 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)
regret to do(对将要做的事)遗憾go on to do继而(做另一件事)
regret doing(对已做过的事)后悔go on doing继续(做原来的事)
fstop to do停下来去做另一件事
stop doing停止正在做的事
2.下列动词短语中的to是介词,后面应接动名词或名词:
object to,resort to,react to,contribute to,look forward to,be accustomed to,be committed to.be ex.
posed to,be subjected to,be devoted to,be dedicated to,be opposed to,be reconciled to.be contrary to

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