摘要：可作主语的非谓语动词 是不定式和动名词. 例1 To act like that is foolish. 例2 Walking is good exercise. 例3 ---Why were you so late for work today ? ---Driving to the office was very slow this morning because of the traffic. 一般说来.动名词与不定式作主语时.可以互换.注意: 1)表示具体的.尤其是未发生的动作.倾向用不定式(例1).表示无时限的泛指动作(例2).或描述当时的情况(例3)倾向用动名词. 2)下列句型用动名词作主语: It is no good(use) arguing with you. There is no knowing what may happen.(不可能知道将会发生什么.)

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