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第三人称单数的变化规则一、哪些主语是第三人称单数？（一）人称代词he,she,it是第三人称单数。如：1.Helikescars.他喜欢车。2.Shegoestoschoolatseven.她七点去上学。3.Ithasagoodname.它有一个好名字。（二）单个人名、地名或亲友的称呼等作主语，是第三人称单数。如：1.MissWang（人名）waterstheflowersonceaday.王老师一天给花浇水一次。2.BeijingisinChina.北京在中国。3.AuntMary（亲友）usuallymakescakes.玛丽阿姨经常做蛋糕。（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：1.Ahorseisausefulanimal.马是有用的动物。2.Thisbookisyours.这本书是你的。3.Thatcarisred.那辆小车是红色的。4.Thecatiscute.这只猫是可爱的。（四）不定代词someone,somebody,nobody,everything,something,作主语时，是第三人称单数。如：1.Everyoneishere.每个人都到齐了。2.EverythingisOK.万事俱备。（五）不可数名词作主语时，看作第三人称单数。如：1.Themilkisintheglass.牛奶在玻璃杯里。（六）当数字或字母作主语时，看作第三人称单数。如：1.“6”isaluckynumber.“6”是个吉利的数字。2.“I”isaletter.“I”是个字母。二、第三人称单数形式的构成（一）一般直接在词尾加-s如：1.work-workslive-livesmake-makes(二)以o,s,x,ch,sh等结尾的单词加-es如：go-goesdo-doesmiss-missesfix-fixesfinish-finishesteach-teaches（三）以辅音字母加y结尾的单词，变y为i,再加-es如:fly-fliescarry-carries(四)特殊变形的有：have-has一般疑问句和特殊疑问句一、一般疑问句be动词(am,isare)肯定：Yes,主语+引导词引导词can/will/should等情态动词答语do/does/did助动词否定：No,主语+引导词+not二、特殊疑问句（即由特殊疑问词引导的疑问句）特殊疑问词有：when,where,who,what,whose,why,howbe动词(am,isare)特殊疑问词+can/will/should等情态动词+主语+谓语+其他do/does/did助动词改写否定句型be动词+notcan/will/should等情态动词+not主语+do/does/did+not+谓语动词感叹句的表述What+a/an+形容词+名词例：Whataninterestingfilm!How+形容词+主语+谓语例：Howinterestingthefilmis!补充知识点动词原形如：buy(买)1、begoingto+地点如：thepark打算...时间如：onMonday2、wantto+动词原形表示“想要...”3、在......转弯用介词“at”,如turnleftat.../turnrightat4、like+V-ing,如：Helikesplayingbasketball.5、by+交通工具，表示交通方式。6、goto+地点，表示“去...”;getto+地点，表示“到...”7、nextto挨着；near在...附近;infrontof...在...前面；behind...在...后面8、befarfrom...离...远的第三人称单数变化规则练习题一、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________study_______brush________teach_______wash_________match_______guess______study______finish_________do________stop______see________drive________let_______carry______keep_____have________stay_______begin______forget_______die_______run_______prefer______give________ring_______dance______hope_______snow______carry_________fly________cry_________guess______study________二、将括号里动词的适当形式填入横线上。1.I________inthecorridors.(walk)2.He_________inthecorridors.(run)3.She___________herfaceonceaday.(wash)4.They____________theirteethonceaday.(brush)5.You___________upyourclothesonceaday.(hang)6.We____________ourhomeworkonceaday.(finish)7.He____________rubbishintheclassroom.(throw)8.She_____________rubbishonthefloor.(throw)9.I_____________rubbishinthebin.(throw)10.They___________thetableonceaday.(set)11.Peternever_________inthecorridors.(run)12.Maryusually_________thetable.(set)13.PatandKen_________theplantsinthemorning.(water)14.Theboy__________hishaironceaday.(comb)15.MissCheng_________TVathome.(watch)16.Mysister__________hisschoolbagonceaday.(pack)17.Mymother_________dinnerforme.(cook)18.Myparents_________thehouseatChineseNewYear.(clean)19.Myteachers_________ussomegifts.(give)20.Myfriends_________thetablewithme.(set)三、用括号内动词的适当形式填空。1.Heoften________(have)dinnerathome.2.We_______(notwatch)TVonMonday.3.Nick_______(notgo)tothezooonSunday.4.______they________(like)theWorldCup?5.What_______theyoften_______(do)onSaturdays?6._______yourparents_______(read)newspaperseveryday?7.Thegirl_______(teach)usEnglishonSundays.8.SheandI________(take)awalktogethereveryevening.9.There________(be)somewaterinthebottle.10.Mike_______(like)cooking.11.They_______(have)thesamehobby.12.Myaunt_______(look)afterherbabycarefully.13.Youalways_______(do)yourhomeworkwell.14.I_______(be)ill.I’mstayinginbed.15.She_______(go)toschoolfromMondaytoFriday.16.LiuTao_______(do)notlikePE.17.Thechildoften_______(watch)TVintheevening.18.SuHaiandSuYang_______(have)eightlessonsthisterm.四、选择正确的单词填到括号里。1.WhatdoesCandy__________(wants,want)tobe?2.You__________(should,shouldn’t)bequietinthelibrary.3.Heshouldn’t___________(throw,throws)rubbishonthefloor.4.Peter___________(help,helps)hismotherathome.5.Shenever_________(run,runs)inthecorridors.6.Weshould__________(walks,walk)inthecorridors.7.He_________(don’t,doesn’t)getupearly.8.Howoften__________(do,does)yourfathergotobed?五、用所给动词的适当形式填空：1、He________(watch看)TVeveryevening.2、Wealways________toschoolonfoot.(go)3、I________(see)2applesinthebox.4、They________(guess)youareKangkang.5、Kangkang________(live)inZherongwithhismom.6、You_______(look)likeyoursister.7、Myfriend________(look)ataphoto.8、LiMingandKangkang________(wash)theirfaceseveryday.9、He_______(have)2toybikesathome.10、Ourdog_______(love)us.11、HeandI_______(go)tothepark(公园)Sunday（周日）.12、Mr.Yang________(teach)usEnglish.13、Mysister___________(study)Englishthisafternoon.14、Jane_______(do)herhomework(作业)byherself(自己).句型转换练习题一、改成一般疑问句1、Heisastudent.2、Shecandance.3、Youlikeapples.二、改成否定句1、Heisastudent.2、Shecandance.3、Youlikeapples.三、对划线部分提问1、Hegoestoschoolbybus.2、Heisacoach.3、Thehospitalisnearthebookstore.4、Iamgoingtothecinematomorrow.四、改成感叹句1、Thecinemaisgreat.2、Thegirlisbeautiful.