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主动语态变为被动语态时注意含直接宾语和间接宾语的主动语态变为被动语态时有两种情况:
Eg He gave the boy an apple. →
(1)把间接宾语改为主语,直接宾语保留不变:
The boy was given an apple
(2)把直接宾语改为主语,此时,间接宾语前要 加to或for.
An apple was given to the boy.
不带的to不定式,改为被动语态时不定 .式前要加to .
They watched the children sing. →
The children were watched to sing .
3.短语动词是不可分割的整体,改为被动语态时要保持其完整性,介词或副词不可遗漏.
We must take good care of the young trees. →
Young trees must be taken good care of.
带复合宾语的动词改为被动语态时,一般把主动语态的宾语改为主语,宾语补足语在被动语态中作主语补足语.
He cut his hair short. →
His hair was cut short.
They told him to help me. →
He was told to help me.
注意: 不及物动词不能用被动语态happen ,take place, appear
but不及物动词带上介词或副词构成的短语,相当于及物动词, 后面可带宾语
