一般现在时讲解※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。二、单个人名、地名或称呼作主语;是第三人称单数。如:①HanMeilikessalsd.韩梅喜欢萨拉。②BeijingisinChina.北京在中国。③UncleWangoftenplaysvolleyball..王叔叔经常打排球。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:②Thisbookisyours.这本书是你的。③Thatcarisred.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。①Everyoneishere.大家到齐了。②Thereisawatchonthetable.桌上有块手表。③Thisisapen.这是一支钢笔。④Thatisaneraser.五、不可数名词作主语时为第三人称单数。如:1.一般现在时的基本用法:•1)经常性或习惯性的动作,常与表示频率副词的时间状语连用。•通常与副词everyday(每天),always(总是),usually(通常),often(经常)sometimes(有时),等时间状语连用。•例:(1)表示事物或人物的特征、状态。例如:IwakeupatsixO’clockeverymorning.•MyfriendsoftengototheparkonSundays.2)用于表示客观真理,客观存在,科学事实。例如:Theearthmovesaroundthesun.地球绕着太阳转。TomorrowisTuesday.明天是星期二•3)用于格言或警句中。•例如:•Wherethereisawill,thereisaway.有志者事竟成。•4)用于表示现在时刻的状态、能力、性格、个性。•例如:•Sheisagoodgirlandalwayshelpothers.她是一个好女孩,经常帮助别人。•Mywatchisverynew。我的手表很新。•2.一般现在时的构成:•当主语是第一人称,第二人称或第三人称复数时,谓语动词要用动词原形。•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★动词三单形式的变化规则:1.(1)多数直接在动词词尾加-s.play—playslike—likesask---askswork---worksget---getscall---calls(2)以字母s,x,ch,sh或o结尾的动词,在词尾直接加-es.watch---watcheswish---wishesdo---doesgo---goes(3)以“辅音字母加-y”结尾的动词,要先变y为i再加-es.try---triesstudy---studiescry---criesfly---flies2.不规则变化:be----ishave----has3.一般现在时的句子转换:•(1)当句子中有be动词或情态动词时,则把be动词或情态动词提到主语的前面变成疑问句;在be动词或情态动词后面加not变成否定句.•(2)当句子中即没有be动词,也没有情态动词时,则在主语前加助动词do,does变成问句;在主语后谓语动词前加助动词don’t,doesn’t变成否定句,助动词后的谓语动词要变成动词原形。一般现在时态专练•二、用Be动词填空。1.youLiFen?No,Inot.2.Mr.greenverybusy?Yes,he.3..Thisbookveryinteresting.4.Whatclassyouin?5.YouandIgoodfriends.•6.Thebasketballclubfun.•一、用括号中所给词的适当形式填空;•1.Ioften_____(go)swimmingonSunday.•2.Mydaughter_________(watch)TVeveryday.Sometimesshe_______(see)afilmonSunday.3.LiWei________(have)adaughter.•4.Hermother___________(teach)Englishatamiddleschool.•5.Jackoften___________(listen)totheradio.•6.He________(say)thatLiLeiistired.gowatchesseeshaveteacheslistenssays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)pears?6._______yourparents_______(have)eggseveryday?7.There________(be)somewaterinthebottle.18.Mike_______(like)cooking.9.They_______(have)thesamehobby.10.LiuTao_______(do)notlikePE.11.Thisboyoften_______(watch)TVintheevening.•二、将下列句子变成否定式和疑问式:•1.Wegotoschoolatnight.••2.Mybrotherworksinafactory.•3.HernameisMeiLing.•Wedon’tgotoschoolatnight.Doyougotoschoolatnight?Mybrotherdoesn’tworkinafactory.Doesyourbrotherworkinafactory?Hernameisn’tMeiLing.IshernameMeiLing?•4.Youhavegotaredpencil.•5.Shehaslunchathome.Youhaven’tgotaredpencil.Haveyougotaredpencil?Shedoesn’thavelunchathome.Doesshehavelunchathome?三、按照要求改写句子1.DanielwatchesTVeveryevening.(改为否定句)_____________________________________________2.Idomyhomeworkeveryday.(改为一般疑问句,作否定回答)_____________________________________________3.Shelikesmilk.(改为一般疑问句,作肯定回答)___________________________4.Amylikesplayingcomputergames.(改为一般疑问句,作否定回答)_____________________________________________5.Wegotoschooleverymorning.(改为否定句)_____________________________________________6.JohncomesfromCanada(加拿大).(对划线部分提问)_____________________________________________7.Sheisagoodstudent.(改为一般疑问句,作否定回答)___________________________________________________