主动语态变为被动语态专项练习（一）、当我们不知道谁是动作的执行者；（二）、或者只需强调动作的承受者时，要用被动语态。
主动语态变被动语态步骤：1、主语和宾语交换位置（即将原来的主语变为宾语、将原来的宾语变为主语）；2、谓语动词变为“be+V过去分词”；3、主动语态中的主语变为介词by的宾语。
一般现在时的被动语态：am/are/is + V过去分词 play football all over the world.. Green teaches us this term.often play basketball after class.use knives for cutting things.often helps his mother to do housework.use cameras for taking photos.don’t make cars in this factory.she wash the clothes?一般过去时的被动语态：was/were + V过去分词 built the Great Wall long ago.years ago we used the machines to make shoes for children.watched a match on TV.washed the car yesterday.teacher asked the student to bring some photos.sent a postcard to me yesterday.boys didn’t do their homework.you clean the room last night?一般将来时的被动语态：is/am/are going to + be+ V过去分词或 will +be+ V过去分词will write a diary next class.is going to hold a birthday party.will have a test tomorrow.will teach me with my English.will borrow a book from the library.’m going to buy a car next year.are going to finish the work soon.won’t see a movie this Sunday.you going to buy a computer?含有情态动词的被动语态：情态动词(can/must/should/have to)+be+ V过去分词have to finish our homework on time.must hand in your homework on time.should plant more trees.could play the violin when he was 7.should speak to the old man politely.should allow children to choose their own clothes.can’t see the sun at night.带有双宾语（宾语既有人又有物）的被动语态:(1)将间接宾语(人)变为主语，直接宾语(物)不变。
(2)将直接宾语(物)变为主语，一般要在间接宾语前加介词to或for.often gives me a flower.my mother told me an interesting story.will buy me a present.Xu teaches us physics.drew him a picture.often makes me a postcard.’ll buy him a big house.usually hear her sing English songs in the morning.makes her horse work all day.makes her horse work all day.感官动词(make,let,have)和使役动词(see,look at,watch,notice,hear,listen to)变为被动语态时要把省略了的to还原出来。
感官动词:make sb do sthlet sb do sthhave sb do sth使役动词:see sb do sthlook sb do sthwatch sb do sthnotice sb do sthhear sb do sthlisten sb do sthsaw him fall off the tree.saw the boy play basketball at 3:00 yesterday. saw him enter the house.clean our classroom every day.people speak Englsih.washed his shoes yesterday.boss makes the workers work 18 hours a day.can write a great many letter with the computer.has brought his book here.must hand in your compositions after class.aunt visited me to her dinner party.uncle gave me a present on my birthday.often hear him play the guitar.bought ten computers last term.bought his friend some fruits yesterday.will finish the work in ten days.foreign friends gave us some wonderful stamps.teacher saked Tom to turn on the computer.must take this medicine three times a day.they often talk about this question?( ) is a warm girl. We like to make friends with her.A. hotB. strangeC. friendlyD. heated( ) of people are crazy about the World Cup.A. annoyed withB. excited aboutC. worried aboutD. satisfied with( ) Brown walks through the park and says hello to all of those he passes.A. look afterB. plays withC. watchesD. greets( ) hard, or others will take your position.A. get your jobB. get your seatC. sit on your chairD. help do your job ( )25.—I thank the best way to learn English is using it.— I can't agree more!really agree with you. don't think so.sounds interesting. don't use it anymore. ( ) it _______ UFO or ______ alien?.A. a ; anB. a ; aC. an ; anD. an ; a( ) girl practices conversations with friends to improve her _______ skills.A. spoke B .speaks C. speaking D. writing( )28. I'm not sure _______ I've met himbefore.A. whenB. ifC. howD. why ( )29. A ____lazy man can't make______ money.too,too much too,much tootoo,too many much,too much( ) teacher told us ______________.A. what the earth travels around the sun.B. what the earth traveled around the sun.C. that the earth traveled around the sun.D. that the earth travels around the sun. ( )31. The woman has long hair is our math teacher.A .whom B. who C. what D. which ( ) used to ________ in the morning, but now she is used to ______ at night.A. read ; readB. reading ; readingC. reading ; readD. read ; reading( )'s mother ________ Tina because she always comes to top in her class.A. is strict withB. worries aboutC. take pride inD. is proud in( ) 34.— _________ important invention the computer is!— I think so.A. What aB. HowC. What anD. How an ( ) I _______ he _______ listening to western classical music.A. Not only ; but also ; enjoysB. Not only ; but also ; enjoyC. Both ; and ; enjoysD. Both ; and ; like to( ), everyone. I have _______ to tell you. serious somethingserious nothing( ) don't know if Jack ______ tomorrow. If he ______ , call me, please.come ; will come ; comecome ; comes ; comes( )38. Children, you should remember: ______careful you are,_____mistakes you will make.more ; the more fewer ; the moremore ; the less more the fewer( )39.—I will go to the countryside to see my grandmother this afternoon, so I can't go swimming with you.—____________.A. It's my pleasure.B. You are welcome.C. That's a pity.D. Sure, I am.。