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(2)含有复合宾语的主动句变为被动句的方法。
① 将宾语变为主语，宾语补足语保留不动。如：
They call her little Li.
She is called little Li.
He left the door open.
The door was left open by him.
② make, let, hear, watch, see, feel, have, notice, help等动词后面作宾语补足语的不定式一般不带to，可是当变为被动语态时，后面的不定式必须带to。如：
My brother often made me do this and that when I was young.
I was often made to do this and that by my brother when I was young.
③ 含有情态动词的被动语态，是由“情态动词 + be +(及物动词的)过去分词”构成。如：
They can not find him.
He can not be found.
④ 短语动词的被动语态
一般说来，只有及物动词才有被动语态，因为只有及物动词才可能有动作的承受者。但有许多由不及物动词加介词及其他词类构成的短语动词，相当于及物动 词，可以有宾语，因而也可以有被动语态。但应注意，短语动词是一个不可分割的整体，在变为被动语态时，不可丢掉构成短语动词的介词或副词。如：
They had put out the fire before the fire brigade arrived.
The fire had been put out before the fire brigade arrived.
They will set up a new public school here.
A new public school will be set up here.
You must take good care of these trees.
These trees must be taken good care of.
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