初一英语health and diet课件.ppt

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1、Unit2Lesson2AHealthyDietcancouldmaymightmustshallshouldwillwouldneed现在时（三单）否定过去式词意疑问句（三单）canmaymustshouldneedwouldcould能，会can’tcanCanhedo…?maymight可能,会mustn’t/can’t/maynotMayhedo…?must/必须needn’tMusthedo…?should/shouldn’tShouldhedo…?need/有必要needn’tNeedhedo…?would/将会,愿wouldn’tWoul

2、dhedo…?情态动词应该haveto表示“不得不”，“必须”Ihavetogotothedoctor.我不得不去医院。Ihavetoconfesssomething.我必须坦白一件事。我不得不用冷水洗衣服。Ihavetowashclotheswithcoldwater.haveto是一个比较特殊的情态动词，它与其他的情态动词不同：它有人称、数和时态的变化，具体变化与have作为行为动词的变化法则一致。肯定否定疑问与回答现在过去将来have/hastodon’t/doesn’thavetoDoyou/Doeshehaveto…?Yes,Ido/hedo

3、es.hadtodidn’thavetoDidyou/hehaveto…?No,I/hedidn’t.willhavetowon’thavetoWillyou/hehaveto…?No,I/hewon’t.haveto否定式：主语+don’t/doesn’t/didn’t/won’t+haveto+dosth.如：Shedoesn’thavetoworryaboutthat.她没有必要担心那件事。疑问式：Do/Does/Did/Will+主语+haveto+dosth?—Yes,主语+do/does/did/will.—No,主语+don’t/does

4、n’t/didn’t/won’t.如：玛丽必须要为我打扫房间吗？DoesMaryhavetocleantheroomforme?—Yes,shedoes./No,shedoesn’t.ExerciseⅠ.Fillintheblankswithdifferentformsof“haveto”Mr.Johnsontoworkveryhardtoearnaliving.Itoleavethepartyearlylastnight.Iwasn’tverywell.Whyhegetupsoearlyeverymorning?我们明天不必起得很早。Wewon’th

5、avetogetupveryearlytomorrow.5.我想他可能不得不在花园里帮他爸爸。Ithinkhemayhavetohelphisdadinthegarden.hastohadtohavetodoeshavetomust与haveto的区别：must表示的是说话人的主观看法，而haveto表示的却是客观需要。Youhavetoworkhardtohaveabetterlife.为了谋生你必须努力工作。（客观需要）YoumustdowhatItellyou.你必须按照我告诉你的去做。（主观要求）don’t/doesn’thavetodo…=n

6、eedn’tdo…“不必要”做….mustn’t“禁止；一定不要”。ExerciseⅡ我咳嗽得厉害，今天必须去诊所看看。IhavetogototheclinictodaybecauseIcoughalot/heavily.你可不能错过这个现代芭蕾舞剧，它好极了。Youmustn’tmissthatmodernballetbecauseit’swonderful.Yourunagainstthetrafficlight.你不准闯红灯.Youfinishitinsuchashorttime.你不必在那么短的时间内完成它.mustn’tdon’thaveto

7、Model1:A:Areyousleepy?B:Yes,Iam.Ihavetogotobednow.Whataboutyou?A:Idon’thaveto.I’mnotsleepyatall.A:Haveyoufinishedyourhomework?B:No,Ihaven’tyet.A:It’stoolate.Youhavetodoyourhomeworkrightnow.hungry/getsomethingtoeattired/takearestbefondof喜欢，爱好=like/careforfond[fɔnd]a.喜欢的;爱好的（一般用作表

8、语，后+of)e.g.年轻人非常喜欢流行音乐。Theyounglike/careforpopm