1、必须跟-ing常见的这类动词有：
admit, advise, appreciate, avoid, delay, deny, dislike, enjoy, excuse, escape,fancy, finish,forgive,face, endure,involve,imagine, mention, mind, miss,pardon,practise, require,resent，resist,suggest, recall,resist, understand等.
例句：
The doctor advised taking more exercise.
I suggest doing it in a different way.
2、大部分“动词+介词”短语动词,只能后接动词-ing作宾语.这些动词短语有：
think of, give up, aim at, put off, insist on, persist in, be good at, do well in, can‘t help, keep on, leave off, feel like, be tired （afraid,capable,fond） of, set about等.
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