摘要：-ing形式与动词不定式在句中作主语.表语.宾语时的区别.一般说来.表示一个比较抽象或泛指的动作时多用-ing形式.表示一个具体某一次的动作时.多用动词不定式.如:Our job is making steel. She likes playing the piano, but she doesn't want to play it today.

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