动词第三人称单数的变化规则及练习一、使用情况：在一般现在时中，当主语是第三人称单数时，谓语动词要用第三人称单数形式，即常在动词原形后加-s或-es。

(标志词usually often always sometimes never every等)二、变化规则1、直接在动词后+s例如：like- likes play-plays2、以s, x, sh, ch, 接尾的动词：+es例如：wash-washes3、以辅音+o接尾的动词：+es例如：go-goes4、以辅音字母+y接尾的动词：变y为i+es例如：fly-flies以元音字母+y接尾的动词后+s例如：play-plays5、除上述规律外，还应注意下面三点：1)动词have ，遇到主语是第三人称单数时，要用has；动词be 的第三人称单数形式是is。

2）含有动词第三人称单数形式的句子变否定句时，要用doesn't + 动词原形，如：He goes to school at six in the morning. (变否定句)→He doesn't go to school at six in the morning.3)对含有动词第三人称单数形式的句子提问时，要用助动词does如：She goes home at five every day. (对划线部分提问)→When / What time does she go注意：不规则变化：have-----has，be-------is，do-----doesI 写出下列动词的第三人称单数(-s)和现在分词(-ing) godoplayjumpswimrunputsingdancecomegethaveflystudyreadwritelookdrinkeatwalklikeII选择1.Ben_____a new book.A. haveB. hasC. havesD. were2.Ben and Mary some books.A. haveB. hasC. areD. were3.I some stories every day.A. haveB. hasC. areD. were4.I __________ ice cream.A.likeB.likesC.likingD.likees5. Kitty__ English every dayA.readB.readesC.readingD.reads6.A man _____in front of his car.A.walkB.walksC.walkingD.work7.Sam’s bicycle ______a bell.A.have B has C.having D.is having8.I every dayA.swimB.swimsC.swimingD.swimes9.He his homework every day.A.doesB.doC.areD.is10. I ________ my homework every day.A.doB.isC.doesD.are11.They ________ their homework every day.A. doB.doesC. isD.are11.Lucy_______with her hands.A.touchB.touchingC.touchesD.touchs12.Superdog________the boysA.seeB.seesC.seeingD.ses13.Supergirl and Superdog______them.A.savesB.saveC.savingD.is saving14.Jack_______their cow.A.sellsB.sellC.sellingD.are selling15.Jack______up the beanstalk.A.getsB.getC.climbD.climbs16.The giant ______boys.A.eatingB.don’t eatC.eatsD.eat17.The goose_______golden eggs.yysyedyes17.The woman_______the beanstalk.A.cutB.cuttingC.are cutD.cuts18.Her mother ______the beanstalk.A.takeB.is take Ctakes D. taking19Jack andher mother _____happerA.doesB.areC.isD. have20.He____the beans in the ground.A.buyB.putsC.putD.buys二．填空：1.She ______(do) homework by herself.2.Jack ______(go) home by bike.3.The giant______(climb) up the beanstalk.4.Her mum ______(run) to the goose.5.He______(do not)like apple.6,Sam______(put) it under his arm.7.The boy_______(chase) it.8.Kitty______(watch)TV everyday.9.He______(feed)them at 8:00 in the morning.10.When ______(do)he get up?11.Grandma Wang___(live) in Pudong.12.The girls___(give) the key to Grandpa.13.That key ______(open) the old box.14.She ______(say) “I like these puppets”.15.What_____(do)Alice find?16.Which toy_____(do) she like?17.He doesn’t______(know)her name.18.John can’t_______(find) his watch.19.Where _____(do)Grandma live?20.How does he______(go)to the post office?三、请看下面两组句子，注意区分他们的共同点和不同点。

I go to school every day.I don't go to school every day.He go es to school every day.He doesn't go to school every day.Do you go to school every day?Yes, I do. (No, I don't)Does he go to school every day?Yes, he does. (No, he doesn't)注：1）第三人称单数用了does 后面就不用动词的s形式了,而用动词原形.。

2）变为疑问句,要在句首加"do" does ; 变为否定句, 要在动词前面加"do not ,does not", 可以简写为"don't", doesn’t。

一、把下列句子改成一般疑问句并做肯定、否定回答。

1．I usually get up at six o’clock.Do you usually get up at six ?Yes, I do . /No, I don’t .2. We usually write e-mails on Saturday evening？Yes, No,3. They have the same hobby.？Yes, No,4. Suhai and Su yang like listening to music after school.？Yes, No,5. Helen usually watches TV in the evening.？Yes, No,二、否定句:在动词前+doesn't或don't.1. She_____ _____(do)her homework every day.2. He_____ _____(live)in Huanggang.3. The girl_____ _____(look)out of the window and sees many birds in the sky.4. Jenny runs home and_____ _____(sit)on the chair.三、一般疑问句:1._____the desk_____(have)four legs? Yes, it does.2._____she____(do)her homework every day?Yes, she does.3._____he_____(live)in Huanggang? No, he doesn't.4. Does Danny_____(see)the apple tree?四、按照要求改写句子：1. I do my homework every day.(改为一般疑问句，作否定回答)________________________________________________________2. She likes milk.(改为一般疑问句，作肯定回答)____________________________________________________________ 3. Amy likes playing computer games.(改为一般疑问句，作否定回答)___________________________________________________4. We go to school every morning.(改为否定句)_______________________________________________________5. I like taking photos in the park.(对划线部分提问)________________________________________________________6. John comes from Canada.(对划线部分提问)___________________________________________________7. Simon and Daniel like going skating.(改为否定句)___________________________________________________五、改错(划出错误的地方，将正确的写在横线上)1. Is your brother speak English? __________________2. Does he like going fishing? __________________3. He likes play games after class. __________________4. Mr. Wu teaches us English. __________________5. She doesn’t do her homework on Sundays. _________________二、用do或does的适当形式填空1. _____ you ride a bike to school? Yes, I ________.2. ______ your sister like PE? No, she ________.3. What_______ the students have? They have some pens.4. How_______ Linda go to school? She goes to school on foot.5. He _______ not speak English. He speaks Chinese.6. _______ they watch TV on Sundays? Yes, they _______.7. My father and mother ______ not read newspapers on Saturday.三、句型转换1. I go to school by bus. (用He做主语变否定句)________________________________________2. Kim plays baseball very well. (变一般疑问句)________________________________________3. David doesn’t like learning French. （变肯定句）________________________________________4. Alan doesn’t watch TV on school nights. （变肯定句）________________________________________5. We have enough time to do it. (变否定句)________________________________________6. Snoopy has a car. （对划线部分提问）_______ _______________________________________________________ 7. Do you have a pencil? (把主语改成she)_________ _______________________________________________________四、动词的适当形式填空Jim’s father(work) in a bank.He (go) to work by bus every morning, sometimes he (ride) his bike.But he (be) never late for work. He (work) very hard.Jim (like) his father very much. They often （play）badminton（羽毛球）in front of their house, sometimes they (play) table tennis in Jim’s school.Jim (like) to talk with his father. His father (like) to hear Jim talking about his friends and his school. On Saturday or Sunday, they often (play) on the computer. Jim (have) many computer games. But he doesn’t (play) them every day. He also (work) hard at his lessons.【本文档内容可以自由复制内容或自由编辑修改内容期待你的好评和关注，我们将会做得更好】。