主动句英语？被动句分别用英语怎么说
一、主动句***被动句分别用英语怎么说
一、被动语态的构成
被动语态由“be动词+过去分词”构成：如
Everybody likes the cute girl.大家都喜欢这个可爱的女孩。(主动语态)
The cute girl is liked by everybody.这个可爱的女孩受到大家的喜欢。(被动语态)
二、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)，如：
He finished the task.→ The task was finished by him.
注：如果不强调动词发出者，被动语态中的by短语通常可以省略。
三、特殊用法
主动句可以转换成两种被动句型，它们通常是一些表示客观说明的句子，如：
People believed that the old man is innocent.大家相信那个老人是无辜的。
→ It’s believed that the old man is innocent..大家相信那个老人是无辜的。
→ The old man is believed to be innocent.大家相信那个老人是无辜的。
比较上面两类被动句型可以发现，一类是“it+be+过去分词+that从句”，另一类则是“主语+be+过去分词+不定式”，通常可用于这两类被动句型的动词有suppose, think, understand, assume, believe, expect, presume, report, say, fear, feel, know,等，如：
It’s known that she is a kind girl.=She is known to be a kind girl.大家知道她是个善良的女孩。
It’s expected that he will be better soon.= He is expected to be better soon.他应该很快就会好起来。
以上就是主动句变被动句的方法，大家都学会了吗？其实，主被动在我们写作或翻译过程中还是非常重要的，英语多被动，汉语多主动，所以学会这两种语态的转变对我们今后的学习至关重要。所以，希望大家能多思考对比，反复练习运用，尽快掌握该知识点。
二、主动句是不是不用加be动词
主动句含有be动词变成被动语态要根据be动词在句子中的作用来定：
1、如果be动词是系动词，后跟名词/形容词等作表语，那么这个句子没有被动语态，因为没有宾语。
2、如果be动词是助动词，没有意义，只是构成某种时态时，那么它的被动语态就根据句子时态用相应结构的被动语态。
如：
1). He is very happy.( is是系动词，这个句子没有被动语态）
2). He is doing his homework.(is是助动词，实义动词是do，变被动语态）
His homework is being done by him.
3).. She was singing an English song last night.(was是助动词，实义动词是sing,变被动语态度）
An English song was being sung by her last night.
4). He is writing a letter now.(is是助动词，实义动词是write,变被动语态）
A letter is being written by him now.
分析：
被动语态的结构是：助动词be+及物动词的过去分词。
常见的用法：
1)、一般现在时的被动语态结构：am/ is/are+及物动词的过去分词
2)、一般过去时的被动语态结构：was/were+及物动词的过去分词
3)、一般将来时的被动语态结构：will+be+及物动词的过去分词
4)、含有情态动词的被动语态结构：情态动词+be+及物动词的过去分词
5)、现在进行时的被动语态结构： am/is/ are+being+及物动词的过去分词
6)、过去进行时的被动语态结构：was/ were+being+及物动词的过去分词
如：
(1). Chinese is taught at school.
(2). The river was cleaned last week.
(3). A new shop will be opened next week.
(4). The heavy box can be lifted by him.
(5). A story is being told by Uncle Li.
(6). The room w
三、英语主动语态变被动语态例句
主动句：My father wrote the book．我父亲写了这本书。
被动句：The book was written by my father．这本书是我父亲写的
主动句：Our village has built a plastic factory．我们村已经建了一座塑料厂。
被动句：A plastic factory has been built in our village．一座塑料厂在我们村建成了。
主动句：He gave me a dictionary．他给了我一本词典。
被动句：I was given a dictionary by him．
被动句：A dictionary was given（to）me by him．词典是他给我的。
主动句：He teaches us English．他教我们英语。
被动句：We are taught English by him．
被动句：English is taught（to）us by him．英语是他教我们的。
主动句：We made him our group leader．我们让他当了我们组长。
被动句：He was made our group leader．他被选为我们的组长。
主动句：They chose Mr．Li their doctor in 1987．1987年他们选李先生当他的医生。
被动句：Mr．Li was chosen their doctor in 1987．1987年李先生被选为他们的医生。
主动句：We saw him enter the classroom．我们看见他进了教室。
被动句：He was seen to enter the classroom．他被看见走进了教室。
主动句：He made the boy sit down．他使那孩子坐下。
被动句：The boy was made to sit down．那孩子被迫坐下。
被动式谓语时，它们原来所带的介词或副词应保留下来。例如：
主动句：She often looks after the children．她常照顾孩子。
被动句：The children are often looked after．孩子常受到照顾。
主动句：We talked about the matter very often．我们常谈起那事。
被动句：The matter was very often talked about．这事常被谈起。
主动句：She has taken my exercise-books away．她已拿走了我练习本。
被动句：My exercise-books have been taken away．我的练习本被拿走了。
主动句：You must turn off the light before you go to bed．睡觉之前你们必须关灯。
四、英语主动句语法:不能变成被动式的主动句
这些主动句在下列情况下一般不能变为被动语态。
(1)主动句的宾语是反身代词或者互相代词时，不能转换成被动语态。比如：
They can express themselves in English after four years’ study.
学了4年英语后，他们能用英语来表达自己了。
不能变成：Themselves can be expressed in English by them after four years’ study.
They often help each other.
他们经常互相帮助。
不能变成：Each other is often helped by them.
(2)在主动句中，宾语之前如果带有形容词性物主代词时，不能转换成被动语态。比如：
The girl waved her hands to them.
那个姑娘向他们挥动双手。
不能变成：Her hands were waved to them by the girl.
They cut their way through the forest with their axes.
他们用斧子在森林里开辟道路。
不能变成：Their way was cut by them through the forest with their axes.
(3)主动句的宾语是动名词或者不定式时，不能转换成被动语态。比如：
She enjoyed playing table-tennis.
她喜欢打乒乓球。
不能变成：Playing table-tennis is enjoyed by her.
They refused to believe us.
他们不肯相信我们。
不能变成：To believe us was refused by them.
(4)主动句的宾语是谓语的同源宾语时，不能转换为被动语态。比如：
Last night he dreamed a beautiful dream.
昨夜他做了个美梦。
不能变成：Last night a beautiful dream was dreamed by him.
The working people led a miserable life before liberation.
解放前劳动人民过着悲剧的生活。
不能变成：A miserable life was led by the working people before liberation.
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