这个需要不断积累.时间长了,就习惯了.规律好象不明显.因为即使都是动词,跟的是不定式还是ING,都不一定.之所以知道,是因为你已经背下来了. 但规律还有一点.比如强制性动词(make)+do 普通的如(want)+to do 至于ING嘛,一般用于被动式,如the letter needs writing. The girl is forced to play the piano.The girl is made to play the piano.以上两句说明被动语态里的动词+to的情况较多.还有就是感官动词如see him play/playing是加do/doing.
