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一般现在时中的第三人称单数形式在一般现在时中，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。（一）什么是一般现在时？一般现在时的基本用法有哪些呢？【一般现在时的功能】1.表示事物或人物的特征、状态。如：Theskyisblue.天空是蓝色的。2.表示经常性或习惯性的动作。如：Igetupatsixeveryday.我每天六点起床。3.表示客观现实。如：Theearthgoesaroundthesun.地球绕着太阳转。（二）哪些主语是第三人称单数?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。hehaslunchattwelve.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。标志词（时间状语）：always,everyweek(day,year,month…),onceaweek,every…,sometimes,at…,onSundayuausllyoften,never,hardly..........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。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：Hegoestoschoolatsixinthemorning.(变否定句)→Hedoesn'tgotoschoolatsixinthemorning.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：Shegoeshomeatfiveeveryday.(对划线部分提问)→When/Whattimedoesshegohomeeveryday?（三）含有动词第三人称单数形式的句子变否定句和疑问时怎样变？【注意：】只要句子中出现do,does,don’t,doesn’t,句子中原来的实意动词要用原形例如：Helikesapples.(改成否定句)Hedoesn’tlikesapples。(错)Hedoesn’tlikeapples。(对)A否定句：（1）当主语是第一，二或复数时，主语+don't+动词原形(+其它)。如：Idon'tlikebread.（2）当主语为第三人称单数时，要用doesn't构成否定句。如：Hedoesn'toftenplay.B一般疑问句：（1）当主语是第一，二或复数时，Do+主语+动词原形+其它。如：Doyouoftenplayfootball?-Yes,Ido./No,Idon't.(2)当主语为第三人称单数时，要用does构成一般疑问句。如：-Doesshegotoworkbybike?-Yes,shedoes./No,shedoesn't.C特殊疑问句：疑问词+一般疑问句。如：Howdoesyourfathergotowork?（四）一般现在时------动词第三人称单数形式构成规则（一般现在时中主语时第三人称1、大多数动词在词尾加“S”如：①stop－stopsmake－makesread－readsplay－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－fliescarry－carriesstudy－studiesworry－worries3、以“s,x,ch,sh”结尾的，在词尾加“es”，发音为如：teach－teacheswatch－watches4、以“o”结尾的动词，加“es”，如：go－goesdo－does5、以不发音字母“e”结尾的开音节词，加“s”如：close－closes[iz]6、特殊：○1.be动词包括：am，is，are。第三人称单数用is；过去式为was；复数用are，过去式为were.○2.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is。（五）巩固练习题：一、写出下列动词的第三人称单数形式：sit--guess--die--go--rush--reach--touch--brush--fly--copy--say--run--do--fix--live--cry--enjoy--have--wish--play--Tie--teach--buy--study--drink--go--stay--make--look--carry--come--watch--plant--fly--do--二、用括号内动词的适当形式填空。1.Heoften________(have)dinnerathome.2.DanielandTommy_______(be)inClassOne.3.We_______(notwatch)TVonMonday.4.Nick_______(notgo)tothezooonSunday.5.______they________(like)theWorldCup?6.What_______theyoften_______(do)onSaturdays?7._______yourparents_______(read)newspaperseveryday?8.Thegirl_______(teach)usEnglishonSundays.9.SheandI________(take)awalktogethereveryevening.10.There________(be)somewaterinthebottle.11.Mike_______(like)cooking.12.They_______(have)thesamehobby.13.Myaunt_______(look)afterherbabycarefully.14.Youalways_______(do)yourhomeworkwell.15.I_______(be)ill.I’mstayinginbed.16.She_______(go)toschoolfromMondaytoFriday.17.LiuTao_______(do)notlikePE.18.Thechildoften_______(watch)TVintheevening.19.SuHaiandSuYang_______(have)eightlessonsthisterm.20.－Whatday_______(be)ittoday?－It’sSaturday三、改错(划出错误的地方，将正确的写在横线上)1.IsyourbrotherspeakEnglish?__________________2.Doeshelikesgoingfishing?__________________3.Helikesplaygamesafterclass.__________________4.Mr.WuteachsusEnglish.__________________5.Shedon’tdoherhomeworkonSundays._________________练习题练习一、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___do____teach____meet______bring___练习二、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)练习三、选择正确的单词填到括号里。1.WhatdoesCandy__________(wants,want)tobe?2.Heshouldn’t___________(throw,throws)rubbishonthefloor.3.Peter___________(help,helps)hismotherathome.4.Shenever_________(run,runs)inthecorridors.5.Weshould__________(walks,walk)inthecorridors.6.He_________(don’t,doesn’t)getupearly.7.Howoften__________(do,does)yourfathergotobed?8.We_______(notwatch)TVonMonday.9.Nick_______(notgo)tothezooonSunday.10.______they________(l