be动词的被动语态课件

主动句含有be动词怎么变成被动语态~

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 was being cleaned at this time yesterday.

现在时态 you (are) I (am) it/he/she (is)
过去时态 you (were) I/he/she/it (was)
现在完成时态 I/she/he/it has (been) you have (been)
括号里的是be动词

be动词的被动语态课件
由“助动词be+及物动词的过去分词”构成。被动语态的时态变化只改变be的形式，过去分词部分不变。疑问式和否定式的变化也如此。
一般用法
1.一般现在时的被动语态构成：is / am / are +及物动词的过去分词
Our classroom is cleaned everyday.
I am asked to study hard by my mother.
Knives are used for cutting things.
2.一般过去时的被动语态构成：was / were + 及物动词的过去分词
The new shop was built last year.
Dinosaur eggs were laid long long ago.
3.现在完成时的被动语态构成：has / have + been +及物动词的过去分词
This book has been translated into many languages.
Many man-made satellites have been sent up into space by many countries.
4.一般将来时的被动语态构成：will+ be + 及物动词的过去分词
A new hospital will be built in our city.
Many more trees will be planted next year.
5.含有情态动词的被动语态构成：情态动词+ be + 及物动词的过去分词
Young trees must be watered often.
Your mistakes should be corrected right now.
The door may be locked inside.
Your homework can be handed in tomorrow.
6.现在进行时的被动语态构成：am / is / are + being +及物动词的过去分词
Uncle Wang is mending my bike now.→
My bike is being repaired by Tom now.
They are planting trees over there. →
Trees are being planted over there by them.
7.不定式的被动语态：to + be + 及物动词的过去分词
There are two books to be read. →
There are twenty more trees to be planted.
特殊用法
1.不及物动词无被动语态。 如：happen, break down, come out......
What will happen in 100 years.
The dinosaurs disappeared about 65 million years ago.
2.有些动词用主动形式表示被动意义。 如： write, sell, ride.....
This pen writes well.
This new book sells well.
3.感官动词或使役动词使用省略to的动词不定式，主动语态中不带“to”，但变为被动语态时，须加上“to”。
例：make somebody do something→somebody+ be +made to do something
see somebody do something→somebody +be +seen to do something
A girl saw my wallet drop when she passed by.→My wallet was seen to drop by a girl when she passed by.
The boss made the little boy do heavy work.→The little boy was made to do heavy work by the boss.
4.如果是接双宾语的动词改为被动语态时，直接宾语（物）作主语，那么动词后要用介词，这个介词是由与其搭配的动词决定。
He gave me a book.→A book was given to me by him.
He showed me a ticket.→A ticket was shown to me by him.
My father bought me a new bike. →A new bike was bought for me by my father.
5.一些动词短语用于被动语态时，动词短语应当看作一个整体，而不能丢掉其中的介词或副词。
We can’t laugh at him. →He can’t be laughed at by us.
He listens to the radio every day. →The radio is listened to by him every day.
The nurse is taking care of the sick man. →The sick man is being taken care of by the nurse.
构成be+done.

be动词一共有八种基本形式：
动词原形——be
第一人称单数现在式——am
第三人称单数现在式——is
第二人称单、复数和第一、三人称复数现在式——are
第一、三人称单数过去式——was
第二人称单、复数和第一、三人称复数过去式——were
过去分词——been
现在分词——being。
be动词可以作联系动词或助动词来使用。
1. 联系动词。
be动词作联系动词时，后面必须跟名词、形容词、副词、不定式、分词、动名词、介宾短语等作表语，否则意思是不完整的。be动词的意思是“是”或“在”，本身并无实际意义。如：
My mother is a doctor.
我的母亲是一名医生。
I'm her mother.
我是她的母亲。
The girl is very beautiful.
这位女孩很漂亮。
The boys are away during the morning.
男孩在早上就出去了。
My work is to prepare dinner.
我的工作是准备晚餐。
One of my hobbies is making artificial flowers.
我的爱好之一是制作人造花。
His job is very interesting.
他的工作很有趣。
The cat is under the table.
猫在桌子底下。
2. 助动词。
be动词作助动词时，后面可以跟现在分词构成进行时，或跟过去分词构成被动语态。
My mother is stirring the gravy.
我的母亲在搅拌肉汁。
While he was having lunch, the phone rang.
他在吃午饭时，电话铃响了。
Jesus was hanged on the cross.
耶稣被钉死在了十字架上了。
All of the books in the library are lent for two-week periods.
图书馆所有的书都有两周的借期。
The problem being discussed is how to use the sixteen tenses of English.
正在讨论的问题是如何运用英文中的16种时态。

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