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2. “動詞＋副詞＋介詞”構成的短語動詞，變成變動語態時，要把它們作為一個整體看待。如：

The poor were looked down upon then. 那時窮人被人瞧不起。

 He was looked up to by everyone他被人們所敬仰。

 注：這類短語動詞還有：get out of, look out of, get on with，get along with, catch up with, keep up with等。

3. “動詞+名詞+介詞”構成的短語動動詞，變被動語態時，既可將短語動詞后的賓語作為被動句的主語，也可將短語動詞中的名詞作為被動句的主語。如：

You must pay attention to your pronunciation. 你必須注意你的發音。

Your pronunciation must be paid attention to.

Attention must be paid to your pronunciation.

注：這類短語動詞常見的還有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。

■當主動句的主語是nobody, no one等含有否定意義的復合不定代詞時，被動句中將其變為anybody，作by的賓語，并將謂語動詞變為否定的被動語態。如：

Nobody can lift this stone. 誰也拿不起這塊石頭。

誤：The stone can be lifted by nobody.

正：The stone can not be lifted by anybody.(m.52ysedu.com)

■當否定句中的賓語是anything, anybody, anyone等不定代詞時，在被動句中應將其分別變為nothing, nobody, no one作主語，并將謂語動詞變為肯定的被動語態。如：

They haven’t done anything to make the river clean.

誤：Anything hasn’t been done to make the river clean.

正：Nothing has been done to make the river clean.

■以who為主語開頭的疑問句，變被動時，用by whom放在句首：

Who wrote this novel? 這部小說是誰寫的？

誤：Who was this novel written by?

正：By whom was this novel written?

■主動句中完成進行時態時，相應的被動句變為完成時態。如：

He has been using this dictionary for ten years. 這本詞典他用了十年了。

This dictionary has been used for ten years.

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