英语口语指导:非谓语动词的特征

　非谓语动词的特征：

　　1 如果非谓语动词是及物动词，后面须跟宾语。

　　Studying English is my favorite.(studying 后跟宾语)

　　To help him is my duty. 帮助他是我的责任。(help 后跟宾语)

　　2 非谓语动词可以带有自己的状语或逻辑主语。

　　Working under such a condition is terrible. (under such a condition 是working 的状语)

　　It's too difficult for him to master English in such a short time. (for him 作不定式的逻辑主语)

　　3 非谓语动词仍有语态和时态的变化。

　　I am sorry to have kept you waiting long.(to have kept...是不定式的完成形式)

　　Seen from the mountain, the city looks much more beautiful.(Seen from...是分词的被动形式)

　　4 非谓语动词在句中可以当成名词或者形容词来使用。

　　Our coming made him happy.(coming 起名词作用)

　　There are two big swimming pools here. (swimming 起形容词作用)