【文档说明】《Unit 4 Don’t eat in class》PPT课件8-七年级下册新目标英语【人教版】.ppt，共(33)页，6.385 MB，由小喜鸽上传

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Unit4Don’teatinclass.Grammar:ImperativeSentencesMakethebedeveryday.Don’twatchTVafterschool.ImperativeSentences祈使句1.祈使句表示_______________

__________等的句子。2.通常省略主语_________________。3.句中谓语动词用___________;祈使句的开头是___________。4.句尾用_____号或者号，一般用调

。5.祈使句有和两种。1.Gothererightaway.2.Pleasehelpme.3.Besuretogettherebeforenine.4.Let’sgotothemoviestonight.5.Don’tdoth

atagain.6.Nophotos！命令请求叮嘱建议告诫禁止ImperativeSentences（祈使句）1.祈使句表示请求、命令、建议、叮嘱、劝告等的句子。2.通常省略第二人称主语you。3.句中谓语动词用动词原形;祈使句的开头是动词原形。4.句末用感叹

号或者句号，一般用降调。5.祈使句有肯定和否定两种。1.Gothererightaway.2.Dostudyhard.3.Pleasehelpme.4.Bequiet,please.5.Besuretogettherebeforenine.6.Let

’sgotothemoviestonight.7.Don’tdothatagain.8.Don’tfight,Tom.9.Neversaydie.10.Nosmoking！11.Nophotos！12.Don’tlethimgo.13.Let’snotgother

e.Affirmative(祈使句的肯定式)动词原形+其他...以实义动词原形开头，简称Do型以Be动词开头，简称Be型以Let开头，简称Let型(第一，第三人称祈使句)注意：1.有时,可在祈使句的句首或句末加上please，使语气显得客气，有礼貌。但如果在句尾加pleas

e，应用逗号与前句隔开。2.有时，为了加强语气，可以在肯定祈使句的句首加do.3.祈使句中如果有唤语，一定要用逗号隔开，放在句首或句尾。.Negative（祈使句的否定式）Do型和Be型祈使句的否定式

Don’t+动词原形+其他...（在句首加Don’t.）Let型的祈使句的否定式有两种Don’t+let+宾语+动词原形+...Let+宾语+not+动词原形+...注意：No+名词/动词~ing形式，表示禁止时，尤其是标语等。在肯定祈使句的句首

加never，语气更强烈祈使句用法口诀：命令要求和请求，句子常常省略you，句式简单无主语，PLVB型要记住,D型否定也简单，don’t,no记心间。Whatdothesignsmean?Nosmoking!Don’tsmoke.Noparking!Don’ttakephot

os.Notakingphotos.Nomobilephones!Turnright!Noswimming!Nofood!Keepquiet.一句型转换1.Youmustn’tarrivelateforclasstomorrow.(

改为祈使句)lateforclasstomorrow.2.Youmustcleanyourroomeveryday.(改为祈使句)roomeveryday.3.Youcan’tbringyourcameratoschool..(改为祈使句)

yourcameratoschool.4.Wearglasses.(改为否定句)glasses.二用所给词的适当形式填空1.Tom,(noteat)inclass.2.Please(be)quietinthelibrary.3.Lethismother(make)somesoupfo

rhim.4.Let’s(notgo)tothemovies.Don’tarriveCleanyourDon’tbringDon’tweardon’teatbemakenotgoHaveaquiz知识拓展

祈使句，+and/or+陈述句(在这里祈使句相当于if引导的条件状语从句)Useyourhead,andyou’llfindaway.（顺承关系）动动脑筋，你就会找到方法。Hurryup,orwe’llmissthebus.（从反面来预测结果）快点儿，否

则我们就错过公共汽车了。选择填空1.quickly,oryou’llbelateforschool.A.GetupB.TogetupC.Gettingup2.first,andyouwillhaveagoodtimethere.A.GoingtothezooB.TogotothezooC.Got

othezoo3.Listencarefullyinclass,youcan’tstudywell.A.andB.orC.But4.Workhard,yourdreamwillcometrue.A.orB.butC.andACBCChallengey

ourself.Don’tbelate..Don’truninthehallways..Don’tsayruderemarks..Don’teatsnacksinclass..Don'ttalkinclass..

Wearuniformseveryday..Bepolitetoeachother.Lookatthepicturesaboutourhometown.Makeupatleastfiverulesforourhometown.Tellpeoplenottodama

getheenvironment.Dearfriends:Inorderthat（为了）wecanhaveagoodenvironment(环境).Weshouldhavesomerulesinourhometown.Hopethatallofusca

nlookatthem.1.Keepourtowncleaneveryday.2.__________________________3.__________________________4.__________________________5.______________

____________6.__________________________Yours____祈使句用法口诀：命令要求和请求，句子常常省略you，句式简单无主语，PLVB型要记住,D型否定也简单，don’t,no记心间。Givesomesugg

estions(建议)toyourparents,forexample,”Pleasedon’tdrivetoofast,dad.”