被动语态讲解

He took good care of his little brother yesterday. We cleaned our classroom just now.
Our classroom was cleaned by us just now.


They used this room for resting.
肯定句: Your homework should be finished by yourself. It can be used for writing. 否定句： Books can’t be taken out of the readingroom. Teenagers should not be allowed to go out at night. 疑问句: Should young trees be watered every day? Where can the book be bought? 反意疑问句： Sixteen-year-olds should be allowed to choose their own clothes , shouldn’t they ?
Twenty more keys have been made by us. 现在完成时：
S+ have/has + been+过去分词
1.Lucy is watering the trees. The trees are being watered by Lucy.
2.We have finished our compositions. Our compositions have been finished by us.
一般过去时：
S+was/were +过去分词

They built the tall building last year.
The tall building was built by them last year.

His little brother was taken good care of by him yesterday.
4.We should clean the classroom every day. 5.She will repair the bike tomorrow.
4 The classroom should be cleaned by us every day. 5 The bike will be repaired by her tomorrow..
3.You must turn off the lights.
The lights must be turned off by you.
4.They should learn English well.
English should be learned well by them.
Exercises： 1.Many people speak English.
各种时态的被动语态构成 一般现在时：S+ am/is /are + done
S+ was/were + done 一般过去时：
一般将来时：S+
will
+ be + done
情态动词： S+can/may/must/should+be+done 现在进行时： S+ am/is/are + being +过去分词 过去进行时 S+ was/were + being+ done
Some workers are painting the rooms now． The rooms are being painted by some workers now. 现在进行时：
S+ am/is/are + being +过去分词We have made 来自wenty more keys．
被动语态
专项讲练
The passive voice 被动语态 被动语态基本用法 当句子的主语是动作的执行者时，谓语 的形式是主动语态。当句子的主语是动 作的承受者时，谓语要用被动语态。
被动语态由be+过去分词构成，时态通过 be表现出来。
重点内容 各种句型的被动形式 肯定句 主语+be+过去分词+（by …） 否定句 主语+be not+过去分词+（by …） 一般疑问句 Be+主语+过去分词+(by …)? 特殊疑问句 疑问词+be+主语+过去分词 + （by …）？ 注意：这里 be 的形式决定了被动语态的 时态，其后的过去分词没有变化。
各种时态的被动语态构成 一般现在时：S+ am/is /are + done
S+ was/were + done 一般过去时：
一般将来时：S+
will
+ be + done
情态动词： S+can/may/must/should+be+done 现在进行时： S+ am/is/are + being +过去分词 过去进行时 S+ was/were + being+ done

We will hold a sports meeting next week.
A sports meeting will be held by us next week.
Children will take some photos in the schoolyard tomorrow.

Some photos will be taken by children in the school tomorrow.

Lucy does the homework in the evening.
The homework is done by Lucy in the evening.

They often use computers in class.
Computers are often used by them in class.
情态动词： S+ can/may/must/should + be+过去分词
1.He can take care of the baby.
The baby can be taken care of by him.
2.Lucy may draw the pictures.
The picture may be drawn by Lucy.
现在完成时： S+ had + been+ done 过去完成时：
S+ have/has + been+ done
Exercises： 1.Many people speak English.
1 English is spoken by many people .
2.People used knives for cutting things. 3.We can use the box as a table.
2 Knives are used by people for cutting things. 3 The box can be used by us as a table.
4.We should clean the classroom every day. 5.She will repair the bike tomorrow.
1 English is spoken by many people .
2.People used knives for cutting things. 3.We can use the box as a table.
2 Knives are used by people for cutting things. 3 The box can be used by us as a table.
主动句与被动句之间的转换
We bought some books. 主语 + 谓语动词过去式的主动语态 + 宾语
Some books were bought ( by us ) 主语+谓语动词过去式的被动语态 + 介词+ 宾语
将下列句子由主动句变为被动句或 由被动句变为主动句：
1)Zheng Jie invented this special pen.变被动 句 This special pen was invented Zheng Jie. 2)The bike was fixed up by Jimmy. 变主动句 Jimmy fixed up the bike
3) People use sunglasses to protect their eyes. Sunglasses are used (by people) to protect eyes.
4) Teachers allow students to put up hands in class.
Students are allowed (by teachers) to put up hands in class.
（主动语态）猫吃鱼。
重点内容 各种句型的被动形式 肯定句 主语+be+过去分词+（by …） 否定句 主语+be not+过去分词+（by …） 一般疑问句 Be+主语+过去分词+(by …)? 特殊疑问句 疑问词+be+主语+过去分词 + （by …）？ 注意：这里 be 的形式决定了被动语态的 时态，其后的过去分词没有变化。