9月1日早上9:27--9:40

Jim hurt his arm playing tennis.

Feeling tired, I went to bed early.

同一主語的兩個行為同時發(fā)生，其中一個行為?？捎?ing 形式來表示。這個短語一般放在主句的后面。

I've just seen Carol. She's in the bar having a drink.

A man ran out of the house shouting.

Do something! Don't just stand there doing nothing!

如果一個行為發(fā)生時，另一個行為正在進行，另一方行為可以用-ing 短語來表示：

Jim hurt his arm playing tennis.

Did you cut yourself shaving?

?在while 或 when 后面也可以用-ing 結構：

Jim hurt his arm while playing tennis.

Be careful when crossing the road.

如果一個行為發(fā)生在另一個行為之前，發(fā)生在先的行為用having (done) 表示：

Having found a hotel, we looked for somewhere to have dinner.

Having finished her work, she went home.

after 后也可用-ing 結構：

After finishing her work, she went home.

如果一個短暫行為緊接著另一個短暫行為，第一個行為用-ing 的一般形式，而不用完成式：

Taking a key out of his pocket, he opened the door.

-ing 短語還可以用來解釋某事或說明原因，這時它常放在句首:

Feeling tired, I went to bed early.

Being unemployed, he hasn't got much money.

Not having a car, she finds it difficult to get around.

Having already seen the film twice, I didn't want to go to the cinema.