Unit4 Don27t eat in classSection A Grammar Focus-3c

.,Unit4,.,Unit4Donteatinclass.,SectionAGrammarFocus-3c,.,Objectives,1.TolearnImperativesDont:Dontruninthehallways.2.Tolearntousecanforpermission:Canweeatintheclassroom?3.Tolearntousemodalverbshaveto&must:Wehavetobequietinthelibrary.Wemustbeontimeforclass.,1.不要在楼道里跑。_2.不要打架。_3.有什么规矩？_4.我们必须按时上课。_,Dontfight.,Dontruninthehallways.,Whataretherules?,Wemustbeontimeforclass.,GrammarFocus,.,5.我们可以在教室里吃东西吗？_6.不能。但我们可以在餐厅里吃东西。_7.我们可以在上课的时候带帽子吗？_,Canwewearahatinclass?,No,wecant,butwecaneatinthedininghall.,Canweeatintheclassroom?,8.他在学校里必须穿校服吗？_9.是的，必须。/不，不必。_10.你们必须做什么？_11.在图书馆里我们必须保持安静。_,Yes,hedoes./No,hedoesnt.,Doeshehavetowearauniformatschool?,Whatdoyouhavetodo?,Wehavetobequietinthelibrary.,.,ObserveandLearn,Donteatintheclassroom.Dontfight.Dontruninthehallways.Dontarrivelateforclass.Dontlistentomusicinclass.,Haveathink:祈使句是怎样构成的？一般在什么情况下会用祈使句？,Dont不要做,祈使句一般用来表示请求、命令、劝说、号召、警告等。在祈使句中,通常省略第二人称主语you。肯定式以动词原形开头，否定式一般在动词原形前加dont。,祈使句,.,一、祈使句的肯定式1.以行为动词原形开头，简称Do型。e.g.Comehere.到这儿来。2.以动词be开头，简称Be型。e.g.Bequiet,please.请安静。3.以Let开头，简称Let型。e.g.Letsgo!咱们走吧!,注意：有时可在祈使句的句首或句尾加上please，使语气显得客气、有礼貌。如果在句尾加please，应该用逗号与前句隔开。e.g.Gothisway,please.请这边走。,.,二、祈使句的否定式1.Do型和Be型的否定式是在句首加dont。e.g.Dontsithere.不要坐在这儿。Dontbelate.别迟到。2.以let开头的祈使句，其否定式有两种：一种是直接在句首加dont，另一种是“let+宾语+not+动词原形+(其他)”。e.g.Dontlethimgo.不要让他走。Letsnotgothere.咱们别去那儿。,注意：“No+名词/动词ing形式”表示禁止或规劝，常用于公共场所。e.g.Nophotos!禁止拍照！Nosmoking！禁止吸烟！,【运用】将下列句子翻译成英语。1.请看这幅图画。2.不要在教室里跑。3.让我们帮助他。,Pleaselookatthepicture./Lookatthepicture,please.,Dontrunintheclassroom.,Letshelphim.,4.在图书馆保持安静。5.上课不要迟到。,Bequietinthelibrary.,Dontbelateforclass.,.,Observeandlearn,Haveathink:1.情态动词在用法上有什么共同点？2.can在本单元主要表示什么含义？它还可表达什么意思？3.haveto在用法上与其他情态动词有何区别？,情态动词can,must,haveto后面都接动词原形,.,本单元can意为“可以”，表示请求、允许。如:,Icandanceandsing.,2)can还可表示能力,“能，会”。如:,-Canthestudentsruninthehallways?-Yes,theycan./No,theycant.Wecanteatintheclassroom.,情态动词can,.,肯定句:主语+can+动词原形+其他.否定句：主语+cannot/cant+动词原形+其他.疑问句:Can+主语+动词原形+其他?肯定回答：Yes,主语+can.否定回答：No,主语+cant.,情态动词can的句型结构:,.,情态动词must表说话人的主观看法，表示必须、必要。无人称和数的变化，不能单独使用，必须与其后的动词原形构成谓语。句型结构：主语+must+动词原形+其他.,如:Youmustcomeintime.你必须按时来。Thechildrenmustbebackbefore6oclock.孩子们必须6点前回来。,情态动词must,.,haveto表示必须,强调客观需要,有不得不、被逼无奈做某事的意思。此词既有人称、单复数的变化,也有动词时态的变化。其否定形式和疑问句形式均需要借助助动词do才可以进行变化。,情态动词haveto,.,haveto的句型结构:肯定句：主语have/has/hadtoV原形其他.否定句：主语+dont/doesnt/didnthavetoV原形其他.疑问句:Do/Does/Did主语havetoV原形其他?,如:Shehastolookafterhermotherathome.Wedonthavetocleantheroomtoday.-Doeshehavetogotobednow?-Yes,hedoes./No,hedoesnt.,LibraryRulesDonttalk._,Writetherulesfortheschoollibrary.,Dontlistentomusic.,Donteatordrink.,Donttakephotos.,3a,Bequiet?(she/haveto/inthelibrary)Q:Doesshehavetobequietinthelibrary?A:Yes,shedoes.,Usethewordstomakequestionsabouttherules.Thenwriteanswersaccordingtoyourschool.,3b,2.Eat?(he/haveto/inthedininghall)Q:_?A:_3.Listentomusic?(we/can/inthehallways)Q:_?A:_4.Wearahat?(we/can/intheclassroom)Q:_?A:_,Yes,hedoes.,Doeshehavetoeatinthedininghall,Canwelistentomusicinthehallways,No,wecant.,Canwewearahatintheclassroom,No,wecant.,Atmydreamschool,wedonthavetocometoschooleveryday,Wecaneatinclass,Makeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestSchool!,3c,Wedonthavetowearschooluniforms,Wedonthavetodohomeworkeveryday,Discussandmakerulesforthecomputerroominyourschool.,ComputerRoomRules_,Wemustbequietinthecomputerroom.,Dontruninthecomputerroom.,Donteatordrinkinthecomputerroom.,Wearslippersinthecomputerroom.,ComputerRoomRules_,Wemustbequietinthecomputerroom.,Donteatordrinkinthecomputerroom.,Dontruninthecomputerroom.,Wearslippersinthecomputerroom.,Cleanthecomputerroomeveryday.,.,Dontruninthehallways.Wemustbeontimeforclass.-Canweeatintheclassroom?No,wecant,butwecaneatinthedininghall.-Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesnt.-Whatdoyouhavetodo?Wehavetobequietinthelibrary.,课时重点回顾,I.根据句意及括号内所给单词的提示填空。1.Dont_(be)latenexttime,Jim.2.Ihaveto_(finish)theworkbefore5:00p.m.3.Canwe_(play)gameswiththosegirls?4.Theymust_(think)aboutit.5.Helen,_(do)thedishesnow.,do,be,finish,play,think,.,II.根据括号内的要求完成下列各题，每空一词(含缩略形式)。1.Cantheyjointhesportsclub?(补全肯定答语)Yes,_.2.Shehastogotobedearly.(改为一般疑问句并作否定回答)_she_togotobedearly?_,_.,theycan,Noshedoesnt,Doeshave,.,3.Youcantswimintheriver.(改为祈使句)_intheriver.4.Dancewiththemhere.(改为否定句)_withthemhere.5.Ihavetogetupearlyonthewee