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Canyou…withme?(Wouldyouliketo…?)Sure,I’dloveto.Sorry,Ican’t.Ihaveto…/Imust/I’mgoingto…A:John,canyoucometomyparty?=wouldyoulike__________________?B:_______________.Ihaveto______________.C:CanJohncometotheparty?D:No,________.Hehastostudyforatest.Sorry，Ican’ttocometomypartyhecan’t.studyforatestA:Canyougofishingwithmetomorrow,Tom?C:CanTom__________________?B:Sorry,Ican’t.Ihaveto______________D:No,_______.He___________________.gofishingtomorrowhecan’thastogotothedoctor/Heisgoingtothedoctor./Iamgoingtothedoctor.gotothedoctor.1Fillintheblanksintheconversation.A:Hi,Peter.youcometomyparty_____theweekend?B:Sure,loveto.A:Howabout,Jenny?C:I’mafraidI.Itolookaftermylittlecousin.A:youcome,Jeff?D:Ibeableto,butI’mnotsure.letyouknowtomorrow.CanonI’dyoucan’thaveCanmayI’llⅢ.完成对话A:Hello,Tim,canyou_____tomyparty?B:_______isit?A:Nextweek.______Wednesdaynight.B:Sure,_______to.ButIhaveto_____forthesciencetest.A:It’sa______.Maybe______time.B:Thanksfor________me.comeWhenOnI’dlovenextaskingpitystudyhaveto和musthaveto强调因客观原因而“不得不”。它有时态、人称和数的变化。其第三人称单数为hasto，过去式为hadto。由haveto构成的句子，进行句型转换时要借助do，does和did。e.g.It'sraining.Ihavetostayathome.天在下雨。我不得不待在家里。must强调主观上“必须”，没有人称和数的变化。其句型变换无需借助助动词。e.g.Youmustdoyourhomeworkfirst.你必须先做作业。【例2】—Mustwecleantheclassroom?—No，you______.A．mustn'tB．needC．don'thavetoD．aren't解析:must的一般疑问句的否定回答应用don'thaveto或needn't，肯定回答用must。答案C句意“我们必须打扫教室吗？”“不，不必。”【例1】选词填空，注意适当形式1．Youdon't______comeheretoday.2．We______lateagainnexttime.3．We______strictwithourselves.点拨：1.本句借助助动词do，应该用haveto，must不需借助助动词。2.mustn't表示个人主观的意愿。3.must表示个人主观意愿。答案：1.haveto2.mustn'tbe3.mustbemusthaveto5．Oh，butSamisn'tleavinguntilnextWednesday.哦，但是萨姆直到下周三才要离开。untilconj.&prep.到……时；直到……为止(1)until用于肯定句中，意为“一直到……为止”，主句谓语动词用延续性动词。e.g.Istayeduntilhecameback.我一直待到他回来为止。(2)until用于否定句中，构成not...until，意为“直到……才”，主句谓语动词用短暂性动词，此时until可用before代替。e.g.Iwon'tgothereuntil/beforehecallsme.直到他给我打电话，我才去那儿。【例题】Tonydidn'tfeelbetter______hetooksomemedicine.Iguesshecangotoschoolthisafternoon.A．untilB．whenC．afterD．because点拨：not...until意为“直到……才”，句意为“托尼直到吃了一些药才感觉好多了。我猜他今天下午就能去上学”。B、C、D三项放在句中不合句意。答案：A6．CanyouhangoutwithusonMondaynight？你可以在周一晚上和我们去闲逛吗？hangv.悬挂；垂下，其过去式为：hung。e.g.Shehungherwashingoutinthegarden.她把洗的衣服晾在花园里。hangout常去某处；泡在某处e.g.Theyarealwayshangingoutinthestreet.他们总是在街上闲逛。hangv.吊死；绞死，其过去式为：hanged。e.g.Intheolddays，manypeoplewerehanged.在过去，许多人被绞死。【例题】He______thebasketonthewallafterenteringtheroomyesterday.A．hangB．hangsC．hungD．hanged解析:由yesterday知应用过去时，可排除A、B两项；hang当“悬挂”讲时，过去式为hung，故排除D项。答案C句意昨天他进屋后把篮子挂在了墙上。7.CatchyouonMonday!周一见你们！catchv.及时赶上；接住；抓住，过去式为：caught。e.g.Wecaughtthelastbus.我们赶上了最后一班公共汽车。e.g.Hecaughtmyhandandheldit.他抓住我的手握着。catchupwith追上；赶上e.g.Gooninfront.Icansooncatchupwithyou.你先走...