非谓语动词的用法

Holding a book under his arm, he entered the room.

终止性动词

说明分词表示的动作发生之后，句中谓语动词表示的动作立刻发生。 Entering the room, I found nobody in.
Turning to the right, you will find the post office.

过去分词

持续性动词

　

通常说明分词表示的动作，此句中谓语动词表示的动作先发生。 Written in simple English, the book is easy to read.
I can't find my lost pen. 说明分词表示的动作和句中谓语动词表示的动作并无先后。 He is a person well-known in this country. 代替完成式现在分词的被动语态。 Educated by the party, he became a brave fighter.

完成式不定式

说明行为动词在谓语动词表示的行为动词之前发生。 I'm sorry to have troubled you.