1. 注意变三个方面：将主动语态的宾语改为被动语态的主语；将主动语态的谓语动词改为“be+过去分词”结构；将主动语态的主语改为介词by 之后的宾语，放在谓语动词之后。如：[文章版权 禁止转载:考试与评价 F"V xKBFWD3}5AZf |FroG]
They make TV sets in that factory.[文章来自:考试与评价 F/DP#=U~7` {cOtE(9]
主语 谓语 宾语 其它[文章版权 禁止转载:考试与评价 [ Um; " /?i+xJ@VFroG]
TV sets are made by them in that factory.[文章来自:考试与评价 -N
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主语 谓语 by+宾语 其它部分[文章版权 禁止转载:考试与评价 qRTC-!)y
.6V YH?FroG]
2. 含直接宾语和间接宾语的主动语态改为被动语态时有两种情况：[文章版权 禁止转载:考试与评价 fG7h/Bgzf* ^8G= EFroG]
(1)把间接宾语改为被动语态的主语，直接宾语仍保留原位。如：[文章版权 禁止转载:考试与评价 �|x|~ik
/Y)f\I#jFroG]
He gave the boy an apple. → The boy was given an apple.[文章版权 禁止转载:考试与评价 qC-+P3i fc gM8$1FroG]
Her father bought her a present. →She was bought a present by her father.[文章版权 禁止转载:考试与评价 [f@ugVR;Bcs#QC/T"FFroG]
(2)把直接宾语改为主动语态的主语，此时，间接宾语前要加介词to或for。如上两句可改为：[文章版权 禁止转载:考试与评价 a!IT~ X+I!j5sIFroG]
An apple was given to the boy.[文章版权 禁止转载:考试与评价 M )G
P^hkv#ceSoI7FroG]
A present was bought for her by her father.[文章版权 禁止转载:考试与评价 OX`pr?)%/K &[HuFroG]
3. 带复合宾语的动词在改为被动语态时，一般把主动语态的宾语改为主语，宾语补足语在被动语态中作主语补足语。如：[文章版权 禁止转载:考试与评价 _jG$ o(/gTD T}`4yFroG]
We should keep our room clean and tidy. →Our room should be kept clean and tidy.[文章版权 禁止转载:考试与评价 CHl_cnuL=V?|FroG]
提醒：不带to的动词不定式作宾语补足语的主动语态，改为被动语态时不定式前要加to。如：[文章版权 禁止转载:考试与评价 ,8?h*O{fBJSm7f+|cFroG]
I heard the girl sing in the next room. →The girl was heard to sing in the next room.[文章版权 禁止转载:考试与评价 zNI=Z. `2t!tFhUGFroG]
4. 动词短语的被动语态：动词短语在主动结构中是一个不可分割的词组，在被动语态结构中也是如此，不可丢掉后面的介词或副词。如：[文章版权 禁止转载:考试与评价 )v13*Dp^3%=C(%FroG]
The nurse takes good care of the child. →The child is taken good care of by the nurse.[文章版权 禁止转载:考试与评价 QlLte i Sl- FroG]
5. 含有宾语从句的被动语态：如果主动语态结构中，宾语是从句，变被动语态时，一般用it作形式主语，真正的主语放在后面。可以转换的动词有know， say， believe， find， think， report等。如：[文章版权 禁止转载:考试与评价 8:X
8sB1Jd !zw &^ FroG]
People believe that he is ill. →It is believed that he is ill. (或：He is believed to be ill.)[文章版权 禁止转载:考试与评价 8 C(u6-n1o]vs=W|-RoFroG]
