<一> 例句：

　　He is now, owing to ill health, not so active in class.

　　由于身体不好，他在课堂上不很活跃。

　　<二> 语法分析：

　　介词短语在句中作状语，表示愿意。此外，介词短语作状语还可以表示时间、地点、方式及其他情况。有许多形容词可以跟介词短语作状语，还有些与介词同形的副词，多数都可以用作状语。

　　<三> 触类旁通：

　　(1)She swims every day during the summer.

　　她夏天每天都去游泳。

　　语法分析：介词短语作状语可表示时间。

　　(2)He sat down on the grass.

　　他在草地上坐了下来。

　　语法分析：介词短语作状语表示地点。

　　(3)She looked at me without expression.

　　她面无表情地看着我。

　　语法分析：介词短语作状语表示方式。

　　(4)She's angry on the account.

　　为此她很生气。

　　语法分析：介词短语作状语表示原因。

　　(5)She was annoyed with me.

　　她生我的气。

　　语法分析：形容词+介词短语作状语。

　　(6)The streets were empty of traffic at night.

　　晚上街上没有车辆。

　　语法分析：有时句子的主语可以是一样东西或事物。

　　<四> 巩固练习

　　1. He was born 1976.

　　2. English is being spoken over the world.

　　3. She stared at me astonishment.

　　4. His father had died cancer.

　　5. He was pleased the result.

　　6. She was good looking after people.

　　7. He was excited it.

　　8. Her eyes were full tears.

　　答案： 1. in 2. all 3. in 4. of 5. with 6. at 7. about 8 of