短语动词如何变为被动语态
1. “动词+介词/副词”类短语动词变被动语态的方法
可以将其作为整体看待，注意其中的介词或副词不可拆开或漏掉。如：
The patient is being operated on. 病人正在动手术。
His request was turned down. 他的要求遭到拒绝。
这类短语动词常见的还有agree to, ask for, laugh at, listen to, look after, think of, talk about, call on等。常用的由“及物动词+副词”构成的短语动词有bring about, carry out, find out, give up, hand in, make out, pass on, point out, put away, put on, put off, take off, think over, work out, turn out, sell out, use up, look up等。
2. “动词＋副词＋介词”类短语动词变被动语态的方法
这类短语动词变成被动语态时，也要把它们作为一个整体看待。如：
The poor were looked down upon then. 那时穷人被人瞧不起。
He was looked up to by everyone. 他被人们所敬仰。
这类短语动词还有：get out of, look out of, get on with，get along with, catch up with, keep up with等。
3. “动词+名词+介词”类短语动词变被动语态的方法
既可将短语动词后的宾语作为被动句的主语，也可将短语动词中的名词作为被动句的主语，到底该怎样变，视语义的需要而定。如：
You must pay attention to your pronunciation. 你必须注意你的发音。
Your pronunciation must be paid attention to.
Attention must be paid to your pronunciation.
这类短语动词常见的还有catch sight of, make use of, make fun of, make friends with, set fire to, take care of, take hold of, take part in, take notice of, keep an eye on等。