,Unit9Canyoucometomyparty?SectionAPeriod2(3a-3c),A:Canyoucometomybirthdayparty?B:Sure,I’dloveto.birthdayparty,A:Canyougototheconcert?B:I’msorry,Ican’t.Ihavetoprepareforanexam.gototheconcertprepareforanexam,A:Canyougotothemovies?B:I’msorry,Ican’t.Ihavetogotothedoctor.A:Canhegotothemovies?B:No,hecan’t.Hehastogotothedoctor.gotomoviesgotothedoctor,A:Canyougotothezoo?B:Sorry,Ican’t.Ihavetohelpmyparents.A:Canhegotothezoo?B:No,hecan’t.Hehastohelphisparents.gotothezoohelpmyparents,A:Canyouplaycomputergameswithme?B:Sorry,Ican’t.Ihavetogotothebaseballgame.A:Canheplaycomputergameswithme?B:No,hecan’t.Hehastogotothebaseballgame.playcomputergamesgotothebaseballgame,A:Canyouplaysoccerwithme?B:Sorry,Ican’t.IhavetowatchTV.A:Cansheplaysoccer?B:No,shecan’t.ShehastowatchTV.playsoccerwatchTV,Accept(接受)invitations:Sure/Yes/Ofcourse,I’dloveto.Certainly,I’dliketo.Decline(拒绝)invitations:I’msorry,Ican’t.Ihavetolookaftermygrandmother.Ihavetostudyforamathtest.Iamgoingshoppingwithmyfriend.…,Canyou...?意为“你能……吗？”，可用于邀请别人或委婉地请求某人去做某事。其肯定回答常用Sure,I’dlove/liketo.，否定回答常用I’msorry,Ican’t./Sorry,Ican’t.等。如：---Canyougotothebaseballgame?你能去参加棒球比赛吗？---I’msorry,Ican’t.对不起，我不能。Explanation,单项填空---CanyouhelpmewithmyEnglishthisweekend?---Sorry,I______.Ihavealotofhomeworktodo.A.can’tB.mustn’tC.needn’tD.don’t答案：A题意：“请问这个周末你能帮我学习英语吗？”“对不起，我不能。我有很多作业要做”。不能答应他人的请求时常用“(I’m)Sorry,Ican’t.”。,情态动词haveto与其他的情态动词如can、may、must和should”不同。（1）这4个情态动词没有人称的变化,而haveto有。它的第三人称单数为“hasto”。You/Heshouldstudyhard.你/他应该好好学习。Hehastostudyhard.他不得不好好学习。haveto的用法,（2）这4个情态动词在一般疑问句中将它们放在句首,在否定句中直接在他们后边加not即可。我们以can为例:Canhegowithus?他能和我们一起去吗？Hecan’tgowithus.他不能和我们一起去。而haveto要加助动词do,does或did才可能完成其疑问、否定句。,试将下面三种话分别写成（1）一般疑问句，并作肯定回答。（2）否定句。a.Theyhavetogototheparty.Dotheyhavetogototheparty?Yes,theydo.Theydon’thavetogototheparty.b.Hehastogotoseethedoctor.Doeshehavetogotoseethedoctor?Yes,hedoes.Hedoesn’thavetogotoseethedoctor.,c.Shehadtostudyforamathtestyesterday.Didshehavetostudyforamathyesterday?Yes,shedid.Shedidn’thavetostudyforamathyesterday.,haveto与must二者都有“必须”之意，但haveto表示“客观上的需要”，有人称和时态的变化，否定形式为don’t/doesn’t/didn’thaveto(没必要)；must表示“主观上的要求”，无人称和时态的变化，否定回答一般用needn’t或don'thaveto(不必)。mustn’t表示“禁止”。如：比一比,Wehavetowearwarmclothesinwinter.冬天我们不得不穿上暖和的衣服。(客观需要)ImustfinishmyhomeworkfirstbeforeIwatchTV.看电视前我必须先完成作业。(主观要求),Youdon'thavetotellhimaboutit.你不一定要把此事告诉他。Youmustn'ttellhimaboutit.你一定不要把这件事告诉他。—MustIbehomebeforeeighto’clock?8点之前我必须回家吗？—Yes,youmust./No,youneedn't./No,youdon'thaveto.是的，必须回家。/不，不必。,,Bobcan’tcomeouttoplaybecausehe_____helpDadinthegarden.A.canB.mustC.hastoD.haveto答案：C题意：鲍勃不能出来玩了，他得在花园里帮他爸爸。表示客观上的需要，应用haveto；句子为一般现在时，主语为第三人称单数，故选C。即时练,(2008·厦门中考)---Ican’tgiveupsmoking,doctor.---Foryourhealth,I’mafraidyou________.A.mayB.canC.havetoD.must【解析】选C。may意为“可能、或许”，can意为“能、会”，haveto意为“必须、不得不”，表客观要求，而must表主观愿望。根据题意：为了健康，你必须戒烟，选C。,【2010四川达州】---MustIfinishmyhomeworkrightnow?---No,you____.A.needn’tB.maynotC.mustn’tD.can’t【解析】must在表示“必须,应该”的时候，其疑问句的否定回答常用needn’t或don’thaveto,表示“不必”，而不用mustnot。根据句意must在句中作“必须”讲，故答案选A。,watchTVontheweekendmycousinvisitgrandparentsCompletetheanswerswithmightandoneofthephrasesinthebox.3a1.A:WhatareyougoingtodoonSaturday?B:I’mnotsure.Imight_______________________2.A:Whatareyouplanningtodoafterschool?B:Idon’tknow._______________________visitmygrandparentsImightwatchTV.,3.A:Whenwillyoufinishthesciencehomework?B:_______________________________________________4.A:Whoareyougoingtothemovieswith?B:_______________________________________________5.AreyoufreetocometomyplaceonSaturday?B:_______________________________________________watchTVontheweekendmycousinvisitgrandparentsIdon’tknow.Imightfinishitonweekend.I’mnotsure.Imightgowithmycousin.I’mnotsure.Imighthavetopracticetheviolin.,3bCompletethesentencesbelow.Usethewordsinbracketstohelpyou.1.Inviting:_______________________________(can/playtennis)Accepting:_______________________________2.Inviting:__________________________________________(wouldliketo/gotothemovies)Refusing:_______________________________Reason:_________________________________(mighthaveto)CanyouplaytennisonSaturday?Sure.Thatsoundsgreat.WouldyouliketogotothemoviesonFriday?Sorry,Ican’t.Imighthavetogooutwithmyparents.,3.Inviting:_______________________________(can/hangoutwithustonight)Refusing:_______________________________Reason:____________________________(must)4.Inviting:_______________________________________________(wouldliketo/cometomybirthdayparty)Accepting:_______________________________Canyouhangoutwithustonight?Sorry,I’mnotfree.Imuststudyforatest.Wouldyouliketocometomybirthdayparty?Sure.I’dloveto.,invitev.邀请①Themaninvitedmyfathertogofishingwithhimthismorning.这个男人今天上午邀请我爸爸和他一起去钓鱼。根据句①可知“邀请某人干某事”为invitesb.todosth.。Keypoints,②Iinvitedhimtomyhouseyesterday.我昨天邀请他来我家。根据句②可知invitesb.to后也可跟名词。③Hewillnotcomewithoutyourinvitation.没有你的请柬他是不会来的。根据句③可知invite的名词是invitation。,1.Mr.Greeninvitedme_______(visit)hisfactorylastweek.2.Thanksalotforyour________(invite).ButIhavetostayathometodomyhomework.3.Thanksfor________(invite)metoyourparty.tovisitinvitationinviting即时练,He______metocometohisbirthdaypartythedaybeforeyesterday.A.invitationB.inviteC.invitedD.invites典型例题,答案：选C。解析：句意为：前天他邀请我参加他的生日晚会。（1）invitesb.todosth.“邀请某人做某事”是固定用法，由时间状语确定用一般过去时，故选C。（2）invitesb.tosp.意为“邀请某人到某处”。,3cWritedowneverythingyouhavetodonextweek.Chooseadayandtimetohaveaparty.Theninviteclassmatestoyourparty.A:Canyoucometomyparty?B:Whenisit?A:Nextweek,onThursdaynight.B:I’msorry.Ihavetostudyforamathtest.MON.TUE.WED.THUR.FRI.SAT.SUN.,REVIEWInvitation:Canyoucometomyparty…?Acceptation:Sure,I’dloveto.Yes,I’dloveto.Declination:I’msorry,Ican’t.Ihaveto…I’dloveto,butIhaveto…,单项选择：1.Joe______gotothedoctor.Hislegisbroken.A.havetoB.canC.hastoD.may2.—CanyouhelpmewithmyEnglish?—Sure,______.A.I’dlikeB.I’dloveC.I’dlovetoD.Ihaveto,3.Thanksalotfor______me______yourparty.A.invite;forB.invite;toC.inviting;forD.inviting;to4.Sorry,I’mbusytoday.Ihave______homeworktodo.A.muchtooB.toomuchC.toomanyD.manytoo,句型转换：1.Ihavetostudyforatestthisevening.(改为否定句)I__________________studyforatestthisevening.2.Theycangototheconcert.(改为一般疑问句)______they______totheconcert?don’thavetoCango,3.—CanMarygotoyourbirthdayparty?(作否定回答)—___________,she______.Sorry/Nocan’t,情景对话：1.---______yougotothemallthisweek?---Sure,I’dlove______.2.---______areyoudoingonThursdayafternoon?---Iamgoingtothedoctor.CanWhatto