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被动语态是中考中的重点，又是难点，现将其用法归纳如下:
一､被动语态的含义:当我们不知道谁是动作的执行者，或者没有必要指出谁是动作的执行者，或者只须强调动作的承受者时，常用被动语态。
二､几种常用时态的被动语态的构成与基本用法:
(1)一般现在时的被动语态:am/is/are+动词的过去分词
He uses cotton to make a coat. (改为被动语态)
Cotton is used to make a coat.
They speak English in class every day. (改为被动语态)
English is spoken in class by them every day.
(2)一般过去时的被动语态:was/were+动词的过去分词
They built a house last year. (改为被动语态)
A house was built by them last year.
He wrote some letters yesterday. (改为被动语态)
Some letters were written by him yesterday.
(3)一般将来时的被动语态:will/be (am， is， are) bgoing to+be+动词的过去分词
They will plant the trees tomorrow. (改为被动语态)
The trees will be planted by them tomorrow.
He is going to see his grandparents the day after tomorrow. (改为被动语态)
His grandparents are going to be seen by him the day after tomorrow. (4)含有情态动词的被动语态:情态动词+be+动词的过去分词
We should plant the trees around the lake. (改为被动语态)
The trees should be planted by us around the lake.
We must listen to the teacher carefully in class. (改为被动语态)
The teacher must be listened to carefully by us in class.
(5)现在进行时的被动语态:am/is/are+being+动词的过去分词 He is watering the flowers now. (改为被动语态)
The flowers are being watered now.
We are doing the homework now. (改为被动语态)
The homework is being done by us now.
(6)过去进行时的被动语态:was/were+being+动词的过去分词 They were watching TV at eight yesterday. (改为被动语态)
TV was being watched by them at eight yesterday.
(7)现在完成时的被动语态:have/has+been+动词的过去分词 They have finished the housework. (改为被动语态)
The housework has been finished by them.
三､主动语态变被动语态的方法:
例:He often plays the computer games on Sundays.
他经常在星期天玩电脑游戏。
(1)把主动语态中动词之后的宾语变为被动语态的主语。此句中的宾语是the computer games。
(2)把主动语态中的谓语改成其对应的被动语态的形式，作为被动语态的谓语，谓语随着主语及时态的变化而变化。此句中的谓语plays 变成be played; 因为主语是the computer games以及时态是一般现在时，所以be应用are。
(3)主动语态的主语改为by的宾语，有时可以省略。在此句中主语he改为by him。例如:
He often plays the computer games on Sundays. →
The computer games are often played by him on Sundays.
四､被动语态中须注意的几个问题:
(1)在主动句中动词make， let， have， feel， see， hear， watch， find， notice等后接动词不定式作宾补时，动词不定式都要去掉to， 但在变被动语态时，后面的不定式一定要加上to， 再加动词原形。
make sb. do sth. → sb. be made to do sth. 例如:
The man made the boy do his homework. 这个人让这个小孩做作业。
The boy was made to do his homework. 这个小孩被命令做作业。
hear sb. do sth. → sb. be heard to do sth. 例如:
I heard him sing in the next room. 我听见他在隔壁房间里唱歌了。
He was heard to sing (by me) in the next room.
(2)短语动词在变被动语态时，只变其中的动词，介词与副词保持不变。 She has sent for the doctor. (改为被动语态)
The doctor has been sent for (by her).
They listened to the speaker carefully. (改为被动语态)
The speaker was listened to carefully (by them).
(3)带双宾语的主动句变被动语态时，有两种变法。
第一种:若以“人”(间接宾语)作主语，“物”(直接宾语)不变。
He gave me a book as a present. (改为被动语态)
I was given a book (by him) as a present.
第二种:若以“物”(直接宾语)作主语，“人”(间接宾语)保持不变，但是间接宾语前必须加与其相对应的介词。
He gave me a book as a present. (改为被动语态)
A book was given to me (by him) as a present.
He bought me a cake. (改为被动语态)
A cake was bought for me (by him).
一､被动语态的含义:当我们不知道谁是动作的执行者，或者没有必要指出谁是动作的执行者，或者只须强调动作的承受者时，常用被动语态。
二､几种常用时态的被动语态的构成与基本用法:
(1)一般现在时的被动语态:am/is/are+动词的过去分词
He uses cotton to make a coat. (改为被动语态)
Cotton is used to make a coat.
They speak English in class every day. (改为被动语态)
English is spoken in class by them every day.
(2)一般过去时的被动语态:was/were+动词的过去分词
They built a house last year. (改为被动语态)
A house was built by them last year.
He wrote some letters yesterday. (改为被动语态)
Some letters were written by him yesterday.
(3)一般将来时的被动语态:will/be (am， is， are) bgoing to+be+动词的过去分词
They will plant the trees tomorrow. (改为被动语态)
The trees will be planted by them tomorrow.
He is going to see his grandparents the day after tomorrow. (改为被动语态)
His grandparents are going to be seen by him the day after tomorrow. (4)含有情态动词的被动语态:情态动词+be+动词的过去分词
We should plant the trees around the lake. (改为被动语态)
The trees should be planted by us around the lake.
We must listen to the teacher carefully in class. (改为被动语态)
The teacher must be listened to carefully by us in class.
(5)现在进行时的被动语态:am/is/are+being+动词的过去分词 He is watering the flowers now. (改为被动语态)
The flowers are being watered now.
We are doing the homework now. (改为被动语态)
The homework is being done by us now.
(6)过去进行时的被动语态:was/were+being+动词的过去分词 They were watching TV at eight yesterday. (改为被动语态)
TV was being watched by them at eight yesterday.
(7)现在完成时的被动语态:have/has+been+动词的过去分词 They have finished the housework. (改为被动语态)
The housework has been finished by them.
三､主动语态变被动语态的方法:
例:He often plays the computer games on Sundays.
他经常在星期天玩电脑游戏。
(1)把主动语态中动词之后的宾语变为被动语态的主语。此句中的宾语是the computer games。
(2)把主动语态中的谓语改成其对应的被动语态的形式，作为被动语态的谓语，谓语随着主语及时态的变化而变化。此句中的谓语plays 变成be played; 因为主语是the computer games以及时态是一般现在时，所以be应用are。
(3)主动语态的主语改为by的宾语，有时可以省略。在此句中主语he改为by him。例如:
He often plays the computer games on Sundays. →
The computer games are often played by him on Sundays.
四､被动语态中须注意的几个问题:
(1)在主动句中动词make， let， have， feel， see， hear， watch， find， notice等后接动词不定式作宾补时，动词不定式都要去掉to， 但在变被动语态时，后面的不定式一定要加上to， 再加动词原形。
make sb. do sth. → sb. be made to do sth. 例如:
The man made the boy do his homework. 这个人让这个小孩做作业。
The boy was made to do his homework. 这个小孩被命令做作业。
hear sb. do sth. → sb. be heard to do sth. 例如:
I heard him sing in the next room. 我听见他在隔壁房间里唱歌了。
He was heard to sing (by me) in the next room.
(2)短语动词在变被动语态时，只变其中的动词，介词与副词保持不变。 She has sent for the doctor. (改为被动语态)
The doctor has been sent for (by her).
They listened to the speaker carefully. (改为被动语态)
The speaker was listened to carefully (by them).
(3)带双宾语的主动句变被动语态时，有两种变法。
第一种:若以“人”(间接宾语)作主语，“物”(直接宾语)不变。
He gave me a book as a present. (改为被动语态)
I was given a book (by him) as a present.
第二种:若以“物”(直接宾语)作主语，“人”(间接宾语)保持不变，但是间接宾语前必须加与其相对应的介词。
He gave me a book as a present. (改为被动语态)
A book was given to me (by him) as a present.
He bought me a cake. (改为被动语态)
A cake was bought for me (by him).