主动语态变被动语态的方法
1. 主动语态变被动语态的基本方法
将主动语态的宾语变为被动语态的主语，将主动谓语变为被动谓语(be+过去分词)，将主动语态的主语变为by短语(在被动句中用作状语)：
He broke the cup. → The cup was broken by him.
【注意】若不强调动词执行者，被动语态中的by短语通常可以省略：
He was born in 1986. 他生于1986年。
What is this flower called? 这种花叫什么花?
2. 双宾动词的被动语态
双宾动词即指带双宾语的动词，它们在变为被动语态时，通常是把间接宾语(指人)变为被动语态的主语，而把直接宾语(指事物)保留下来(称为保留宾语)：
He answered me that question. → I was answered that question by him.
有的动词则通常把直接宾语(指事物)变为被动语态的主语，而把间接宾语改为介词to 或for引起的状语(到底用to还是for，与所搭配的动词有关)：
He wrote her a letter. → A letter was written to her. (与动词write搭配用介词to)
She made him a new coat. → A new coat was made for him. (与动词make搭配用介词for)
有时以上两种方式均可用：
He gave her some money. 他给她一些钱。
→ She was given some money. / Some money was given to him.
He bought her a watch. 他给她买了一块表。
→ A watch was bought for her. / She was bought a watch.
3. 被动语态的时态
被动语态的时态由被动结构“be+过去分词”中的动词be来体现，其基本结构和用法如下：
(1) 一般现在时的被动语态：am [is, are]+过去分词
English is taught in our school. 我们学校学英语。
We are taken good care of at school. 我们在学校受到很好的照顾。
(2) 一般过去时的被动语态：was [were]+过去分词
He was taken to the police station. 他被带到了警察局。
The house was built ten years ago. 这座房子是10年前建的。
(3) 一般将来时的被动语态：will be+过去分词
A new building will be built here soon. 不久这里将建一栋新楼。
The meeting will be held at two this afternoon. 会议将于今天下午2点举行。
(4) 现在完成时的被动语态：have [has]been+过去分词
All the work has been done now. 所有的工作现在都做好了。
Have the letters been posted? 信都寄了吗?
(5) 过去完成时的被动语态：had been+过去分词
He said the work had been finished. 他说工作已完成了。
(6) 现在进行时的被动语态：am [is, are] being+过去分词
My watch is being repaired by him. 我的表正在由他修理。
The plan is now being discussed. 计划现在正在讨论。
(7) 过去进行时的被动语态：was [were] being+过去分词
He said that the man was being operated on. 他说那个人正在动手术。
He told me that a new station was being built. 他说正在修建一个新车站。
(8) 过去将来时的被动语态：would be+过去分词
He said that the meeting would be held next week. 他说会议将于下周举于。
4. 含有情态动词的被动形式
若主动语态中谓语含有情态动词，在相应的被动语态中通常应保留该情态动词，其结构为“情态动词+be+过去分词”：
Everyone must know this. →This must be known by everyone.
请看以下带情态动词被动句实例：
This can’t be done in a short time. 这不是短期内可以完成的。
Can this be done by machine? 这可以由机器来做吗?
The work must be done at once. 这工作必须马上做了。
1. 主动语态变被动语态的基本方法
将主动语态的宾语变为被动语态的主语，将主动谓语变为被动谓语(be+过去分词)，将主动语态的主语变为by短语(在被动句中用作状语)：
He broke the cup. → The cup was broken by him.
【注意】若不强调动词执行者，被动语态中的by短语通常可以省略：
He was born in 1986. 他生于1986年。
What is this flower called? 这种花叫什么花?
2. 双宾动词的被动语态
双宾动词即指带双宾语的动词，它们在变为被动语态时，通常是把间接宾语(指人)变为被动语态的主语，而把直接宾语(指事物)保留下来(称为保留宾语)：
He answered me that question. → I was answered that question by him.
有的动词则通常把直接宾语(指事物)变为被动语态的主语，而把间接宾语改为介词to 或for引起的状语(到底用to还是for，与所搭配的动词有关)：
He wrote her a letter. → A letter was written to her. (与动词write搭配用介词to)
She made him a new coat. → A new coat was made for him. (与动词make搭配用介词for)
有时以上两种方式均可用：
He gave her some money. 他给她一些钱。
→ She was given some money. / Some money was given to him.
He bought her a watch. 他给她买了一块表。
→ A watch was bought for her. / She was bought a watch.
3. 被动语态的时态
被动语态的时态由被动结构“be+过去分词”中的动词be来体现，其基本结构和用法如下：
(1) 一般现在时的被动语态：am [is, are]+过去分词
English is taught in our school. 我们学校学英语。
We are taken good care of at school. 我们在学校受到很好的照顾。
(2) 一般过去时的被动语态：was [were]+过去分词
He was taken to the police station. 他被带到了警察局。
The house was built ten years ago. 这座房子是10年前建的。
(3) 一般将来时的被动语态：will be+过去分词
A new building will be built here soon. 不久这里将建一栋新楼。
The meeting will be held at two this afternoon. 会议将于今天下午2点举行。
(4) 现在完成时的被动语态：have [has]been+过去分词
All the work has been done now. 所有的工作现在都做好了。
Have the letters been posted? 信都寄了吗?
(5) 过去完成时的被动语态：had been+过去分词
He said the work had been finished. 他说工作已完成了。
(6) 现在进行时的被动语态：am [is, are] being+过去分词
My watch is being repaired by him. 我的表正在由他修理。
The plan is now being discussed. 计划现在正在讨论。
(7) 过去进行时的被动语态：was [were] being+过去分词
He said that the man was being operated on. 他说那个人正在动手术。
He told me that a new station was being built. 他说正在修建一个新车站。
(8) 过去将来时的被动语态：would be+过去分词
He said that the meeting would be held next week. 他说会议将于下周举于。
4. 含有情态动词的被动形式
若主动语态中谓语含有情态动词，在相应的被动语态中通常应保留该情态动词，其结构为“情态动词+be+过去分词”：
Everyone must know this. →This must be known by everyone.
请看以下带情态动词被动句实例：
This can’t be done in a short time. 这不是短期内可以完成的。
Can this be done by machine? 这可以由机器来做吗?
The work must be done at once. 这工作必须马上做了。
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第1个回答 2016-11-21
主语和宾语换个位置 动词前面加be动词 动词变成被动形式（通常后面加ed）
如果主语是动作的承受者,或者是说动作不是由主语而是由其他人完成的,则用被动语态.主动语态→被动语态：
1、找到该句宾语（必须是在谓语动词后的）,将它提到句子开头.
2、用被动语态结构be+Vt过去分词构成句子.
3、把原句的主语用by构成的介词短语带出,也可不加.
eg：I finished my homework yesterday.
→My homework was finished (by me) yesterday.
特殊形式：
1、部分Vi加上适当介词可当作Vt构成被动语态.
eg：Parents look after their children carefully.
→Children were looked after (by parents) carefully.
2、联系动词没有被动语态.eg：The water feels warm.
3、在主动语态中一些省略to的动词不定式改为被动语态时需加上to.
eg：Teachers often make him stand outside.
→He is often made to stand outside (by teachers).
4、have、let等动词无被动语态.
必要时,have可改为held,let sb to do sth可改为be allowed to do sth (被允许做某事）.
如果主语是动作的承受者,或者是说动作不是由主语而是由其他人完成的,则用被动语态.主动语态→被动语态：
1、找到该句宾语（必须是在谓语动词后的）,将它提到句子开头.
2、用被动语态结构be+Vt过去分词构成句子.
3、把原句的主语用by构成的介词短语带出,也可不加.
eg：I finished my homework yesterday.
→My homework was finished (by me) yesterday.
特殊形式：
1、部分Vi加上适当介词可当作Vt构成被动语态.
eg：Parents look after their children carefully.
→Children were looked after (by parents) carefully.
2、联系动词没有被动语态.eg：The water feels warm.
3、在主动语态中一些省略to的动词不定式改为被动语态时需加上to.
eg：Teachers often make him stand outside.
→He is often made to stand outside (by teachers).
4、have、let等动词无被动语态.
必要时,have可改为held,let sb to do sth可改为be allowed to do sth (被允许做某事）.
第2个回答 2016-11-20
把主动语态的宾语变成主语，要是英语的话，动词前要加be，动词用过去分词形式，后面有的要加介词by或to，视动词而定。想知道是道什么题本回答被网友采纳
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