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八年级英语上册Module12Help模块同步语法精讲精练课件（新版）外研版-（新版）外研级上册英语课件.ppt

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Module12Help③Let型祈使句：Let＋sb.＋动词原形＋其他．eg：Let'splayfootball.让我们踢足球吧。④No型祈使句：No＋v.­ing形式/名词(表示禁止)!eg：Nosmoking！禁止吸烟！Nophotos！禁止拍照！►祈使句的否定形式①Do型和Be型的否定句式都在句首加don't。eg：Don'tforgetme！不要忘记我！Don'tbelateforschool！上学不要迟到！②Let型的否定句有两种：Don't＋let＋宾语＋动词原形＋其他/Let＋宾语＋not＋动词原形＋其他。eg：Don'tlethimgoswimming.＝Lethimnotgoswimming.不要让他去游泳。②may，could，might表示可能性较小的肯定推测，意为“可能，也许”。eg：Youmayberight.你可能是对的。Hecould/mightberunningforexercise.他可能正在跑步锻炼。►否定推测①can't表示有把握的否定推测，意为“不可能”。eg：Thatcan'tbeMary.She'sillinhospital.那不可能是玛丽，她生病住院了。②maynot/mightnot/couldnot表示不太有把握的否定推测，意为“可能不(会)是”。eg：Hecouldnot/mightnotbeathome.I'mnotsure.他可能不在家，我不确定。►疑问句中的推测疑问句中的推测，常用can或could，意为“可能”。eg：Thereissomeoneoutside.Whocanitbe？外面有人，会是谁呢？一、根据句意，选择方框中的单词填空。4．—WhereisDaning?—He___________beintheclassroom，butI'mnotsure.5．Thisproblem__________beveryhard.Fewstudentscanworkitout.二、单项选择。6．________getoffthebusbeforeitstops.A．Don'tB．Doesn'tC．Didn't7．—Someoneisknockingatthedoor.________itbeBetty?—No，it________beher.SheleftforEnglandthismorning.A．Must；can'tB．Can；can'tC．Could；mustn'tD．May；mustn't8．_________harderandyou'llsucceedsoonerorlater(迟早)．A．StudyB．TostudyC．StudyingD．Tostudying9．Let's__________ontimeforclasses.A．beB．benotC．areD．notare10．__________wakeupyoursister，Tony.Sheneedsagoodsleep.A．Don'tB．Doesn'tC．NotD．No11．—Excuseme，whoseJapanesebookisthis?—It_________beTom's.Inourclass，onlyheisstudyingJapanese.A．mustB．can'tC．wouldD．could12．—You_______behappywiththestrongpublicsupportyou'vereceived.—Yes，you'reright.I'mreallyexcited.A．mayB．canC．mustD．need13．—Jim，________readbookswhileyouarewalkinginthestreet.It'sverydangerous.—OK，thankyou.A．don'tB．doesn'tC．won'tD．can't14．—Whereareyougoingthismonth?—We_______gotoXiamen，butwe'renotsure.A．needn'tB．mustC．mightD．mustn't15．—I'msorrytotellyouthatMrLiwasbadlyhurtinatrafficaccidentyesterday.—Oh，it______betrue.Isawhimintheofficejustnow.A．can'tB．mustn'tC．needn'tD．don't()16.Whichofthefollowingsignsmeans“Nophotos”？三、根据句意，用括号中所给单词的适当形式填空。17．It'sanimportantmeeting.___________(notbe)late.18．________(l