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不规则变化：do----doeshave----has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。但有些同学们对于哪些主语是第三人称单数还不十分清楚，现归纳总结如下：一、人称代词he,she,it是第三人称单数。如：HelikeswatchingTV.他喜欢看电视。Shehaslunchattwelve.她十二点吃午餐。Itlookslikeacat.它看起来像只猫。二、单个人名、地名或称呼作主语；是第三人称单数。如：①HanMeilookslikehermother.韩梅看起来像她的母亲。②BeijingisinChina.北京在中国。③UncleWangoftenmakescakes.王叔叔经常做蛋糕。三、单数可数名词或this/that/the+单数可数名词作主语时，是第三人称单数。如：①Ahorseisausefulanimal.马是有用的动物。②Thisbookisyours.这本书是你的。③Thatcarisred.那辆小汽车是红色的。④ThecatisLucy's.这只猫是露茜的。四、不定代词someone,somebody,nobody,everything,something等及指示代词this,that作主语时，是第三人称单数。如：①Everyoneishere.大家到齐了。②Thereissomethingwrongwiththewatch.这块手表有毛病。③Thisisapen.这是一支钢笔。④Thatisaneraser.那是一块橡皮擦。五、不可数名词作主语时为第三人称单数。如：①Themilkisintheglass.牛奶在玻璃杯里。②Thebreadisverysmall.那面包很小。六、当数字或字母作主语时，看作第三人称单数。如：①6isaluckynumber.6是个吉利数字。②Iisaletter.I是个字母。巩固练习题：I.写出下列动词的相应形式：1.第三人称单数：wash_________match_______guess______study______finish_________go________snow______carry_________2.写出下列动词的过去式：stop______see________drive________let_______carry______keep_____join______find_______think________teach______catch______3.写出下列动词的现在分词形式：stay_______begin______forget_______forget______lie________die_______run_______prefer______give________ring_______dance______hope_______II.用所给动词的适当形式填空：1．I________(write)toyouassoonasI_______(get)toLondon.2.Hedoesn’tfeelwelland____________(noteat)anyfoodthismorning.3.He______not_______(see)mecomein,forhe___________(read)somethingwithgreatinterest.4.I_________(let)youhavethebookassoonasI_________(finish)it.5.Whilewe________(wait)forourteacher,alittleboy________(run)uptous.6.Don’tmakeanoise.Grandpa__________(sleep).7.It’ssevennow,Tom’sfamily__________(watch)TV.8.It________(take)metwohourstofinishmyhomeworklastnight.9.What______yourmother_______(do)ateightyesterdayevening?She_______(wash)clothes.10._______it______(rain)whenschoolwasoveryesterday?11.What_______(do)_______tomorrow?We________(play)football.12.There________(be)afootballmatchonTVthisevening.13.Theysaidthey________(visit)theGreatWallthenextsummerholiday.14.Who_______(dance)thebestinyourclass?15.Willyoucomeifhe_____________(notcome)?16.Theteachertoldustheearth__________(move)roundthesun.17.They_______(have)apartyinthegardenifit________(notrain)tomorrow.18She________(buy)asweateryesterday.19.Idon’tknowifMr.Wang______(go)toShanghaitomorrow.Ifhe_____(go),I______(ask)him_______(take)somebookstomydaughter,becauseshe_______(study)there.III单项选择：1.ThestudentswillgototheSummerPalaceifit_____tomorrow.A.don’trainB.doesn’trainC.won’train2.There_____anEnglishfilmnextweek.A.willhaveB.isgoingtohaveC.isgoingtobeD.wasgoingtobe3.Thepicture_______nice.A.looksB.islookedC.lookD.islooking4.She______downandsoonfellasleep.A.liveB.lainC.laidD.lay5.They_____theofficeatnineyesterdaymorning.A.reachedtoB.arrivedC.wentD.getto6.WeshallgotoShanghaionbusinessbeforeyou_____backnextweek.A.wilcomeB.cameC.wouldcomeD.come7.Don’tsmokeuntiltheplane______off.A.takesB.tookC.wastakenD.istake8.Isawher____theroomthismorning.A.toenter()B.enteredC.enterD.enters9.theteacheraskedus______toschoolontime.A.tocomeB.comingC.comeD.comes10.Johnisalways______others.A.helpB.helpingC.helpsD.tohelp11.Hetoldus______ateight.A.workingB.toworkC.workD.worked12.You’dbetter______athomeand______yourhomework.A.tostay,doB.stay,doC.tostay,todoD.stay,todo13.Hesatdown______arest.A.havingB.haveC.tohaveD.had14.UncleWangknows_______awashingmachine.A.howtomakeB.tomakeC.howmakingD.whattomake15.Jimdecided_______PollytoLingFengwhenhewasbacktoEngland.A.toleaveB.leftC.leavingD.leave第三人称单数问题一般现在时中，当主语是第三人称单数时，即常在动词原形后加-s或-es。第三人称单数变化，现归纳总结如下：1.人称代词he,she,it是第三人称单数。如：HelikeswatchingTV.他喜欢看电视。Shehaslunchattwelve.她十二点吃午餐。Itlookslikeacat.它看起来像只猫。2.单个人名、地名或称呼作主语；用第三人称单数。如：①HanMeilookslikehermother.韩梅看起来像她的母亲。②BeijingisinChina.北京在中国。③UncleWangoftenmakescakes.王叔叔经常做蛋糕。4.不定代词someone,somebody,nobody,everything,something等及指示代词this,that作主语时，第三人称单数。①Everyoneishere.大家到齐了。②Thereissomethingwrongwiththewatch.这块手表有毛病。③Thisisapen.这是一支钢笔。④Thatisaneraser.那是一块橡皮擦。5.不可数名词作主语时为第三人称单数。如：①Themilkisintheglass.②Thebreadisverysmall.动词原形变第三人称单数的规则与发音规律同名词单数变复数大致相同，请认真观察。1、大多数动词在词尾加“S”如：①stop－stops[s];make－makes[s]②read－reads[z];play－plays[z]2、以辅音字母加“y”结尾的，要先将“y”变为“i”，然后在加“es”读[iz]如：fly－flies[z]；carry－carries[z]study－studies[z];worry－worries3、以“s,x,ch,sh”结尾的，在词尾加“es”，发音为[iz]如：teach－teaches[iz];watch－watches[iz]4、以“o”结尾的动词，加“es”，如：go－goes[z]do－does[z]注：下面几个动词变为单数时，原词的元音部分的发音发生了较大的变化，请注意记忆。如：1、do[du:]－does[dz]2、say[sei]－says[sez]以不发音字母“e”结尾的开音节词，如果尾音是[s]，[z]时，加“s”后字母“e”发音，与所加“s”一起读做[iz]。如：close－closes[iz]作业I.写出第三人称单数：wash_________match_______guess______study______finish_________go________snow______carry_________II.用所给动词的适当形式填空：1.He________TVeveryevening.(watch)2.Wealways________toschoolonfoot.(go)3.Tom,withhisclassmates,often______footballafterschool.(play)4.Yourshoes_______underthebed.(be)5.______hereand______byme.(come,stand)6.Hisuncleusually_________toworkbybus.(go)7.Ialways______upatsixinthemorning.(get)8.John________likehisfather.(look)III.完成句子1．该吃晚饭了。It’stimeto________________.2．你想来点儿面包吗?Ww