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1、动词第三人称单数的变化规则及练习 一、变化规则 1、直接在动词后+s 例如:like-likes play-plays 2、以 s,x,sh,ch,接尾的动词:+es 例如:wash-washes 3、以辅音+o 接尾的动词:+es 例如:go-goes 4、以辅音+y 接尾的动词:变 y 为 ites 例如:fly-flies 动词及动词短语:+s:plays,skips,sings,gives,starts,likes,buys some toys；gets up comes back home；makes noodles,；eats lunch drinks coffee；begins
2、his class；practices the piano +es:watches TV;brushes his teeth;goes to bed;goes to school;does my homework;does some reading y-i+es:flyflies studystudies 注意:不规则变化:havehas;beis;dodoes 一、写出下列动词的第三人称单数 drink go stay make look have pass carry come watch plant fly 二、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
3、 every day.I dont go to school every day.He goes to school every day.He doesnt go to school every day.Do you go to school every day?Yes,I do.(No,I dont)Does he go to school every day?Yes,he does.(No,he doesnt)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dodoes”:变为否定句，要在动词前面”do not;does not,可
4、以简写为dont.”doesnt”。课堂练习一 一、把下列句子改成一般疑问向并做肯定、否定回答。例如：I usually get up at six o clock.Do you usually get up at six?Yes,I do./No,I dont.1.We usually write mails on Saturday evening.？Yes，No,2.They have the same hobby.？Yes，No,3.Su hai and Su yang like listening to music after school.？Yes，No,4.Helen usuall
5、y watches TV in the evening.？Yes，No,二、否定句:在动词前+doesnt 或 dont.1.She (do)her homework every day.2.He (live)in Huang gang.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
6、 day?Yes,she does.3.he (live)in Huanggang?No,he doesnt.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.(
7、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)课堂练习二 一、写出所给词的第三人称单数形式。sit swim read make play run write have go say do watch cry study wash 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 hav
8、e 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.二、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.(变为一般疑问句句)3.David doesnt li
9、ke learning French.(变为肯定句)4.Do you have a pencil?(把主语改成 she)5.We have enough time to do it.(变为否定句)四、用括号里的动词的适当形式填空。Jims 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 (
10、play)badminton(羽毛球)in front of their house,sometimes they (play)table tennis in Jims 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 doesnt (play)them every day He also (work)hard at his lessons.