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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-likesplay-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+y接尾的动词：变y为i+es例如：fly-flies动词短语：+s:Plays,skips,sings,gives,starts,likes,buyssometoys,getsupcomesbackhomemakesnoodles,eatslunchdrin
2、kscoffeebeginshisclass,practicesthepiano+es:watchesTVbrusheshisteethgoestobedgoestoschooldoesmyhomeworkdoessomereadingy→i+es:fly→fliesstudy→studies注意：不规则变化：have-----has，be-------is，do-----does写出下列动词的第三人称单数drink________go_______stay________make________l
3、ook_________have_______pass_______ carry_____come________ watch______plant_______fly________study_______brush________do_________ teach_______practice________二、请看下面两组句子，注意区分他们的共同点和不同点。Igotoschooleveryday.Idon'tgotoschooleveryday.Hegoestoschooleveryday
4、.Hedoesn'tgotoschooleveryday.Doyougotoschooleveryday?Yes,Ido.(No,Idon't)Doeshegotoschooleveryday?Yes,hedoes.(No,hedoesn'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"donot,doesnot",可以简写为"don't,doesn’t。课堂练习一一、把下列句子改成一般疑问句并做肯
5、定、否定回答。1．Iusuallygetupatsixo’clock.Doyouusuallygetupatsix?Yes,Ido./No,Idon’t.2.Weusuallywritee-mailsonSaturdayevening？Yes,No,3.Theyhavethesamehobby.？Yes,No,4.SuHaiandSuyanglikelisteningtomusicafterschool.？Yes,No,5.HelenusuallywatchesTVintheevening.？Yes
6、,No,二、否定句:在动词前+doesn't或don't.1.She__________(do)herhomeworkeveryday.2.He__________(live)inHuanggang.3.Thegirl__________(look)outofthewindowandseesmanybirdsinthesky.4.Jennyrunshomeand__________(sit)onthechair.三、一般疑问句:1._____thedesk_____(have)fourlegs? Y
7、es,itdoes.2._____she____(do)herhomeworkeveryday?Yes,shedoes.3._____he_____(live)inHuanggang? No,hedoesn't.4.DoesDanny_____(see)theappletree?四、按照要求改写句子：1.Idomyhomeworkeveryday.(改为一般疑问句，作否定回答)________________________________________________________2.Shel
8、ikesmilk.(改为一般疑问句，作肯定回答)____________________________________________________________3.Amylikesplayingcomputergames.(改为一般疑问句，作否定回答)___________________________________________________4.Wegotoschooleverymorning.(改为否定句)_____________________
