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1、Unit4Don'teatinclass.SectionA2d-3cDon’teatinclass.Don’tarrivelateforclassDon’tsleepinclass.Don’tdrawonthewall.Don’ttalk.Don’tplaysportsintheclassroom.Don’tfight.Don’tlistentomusicintheclassroom.schoolrulesDon't...ReviewA:Whataretherules?B:Well,Wecan’t...bu
2、twecan…Wemust…eatinclasslistentomusicoutsidewearhatsatschoolfightinclassspeakloudlyinthelibraryPairwork2d.Role-playtheconversation.John:Hi,myname’sJohn.It’smyfirstdayatschool.Alice:Hi,John.I’mAlice.Thisisagreatschool,buttherearealotofrules.John:Really?What
3、aresomeoftherules?Alice:Well,don’tbelateforclass.Thisisveryimportant.John:OK,sowemustbeontime.Canwebringmusicplayerstoschool?Alice:No,wecan’t.Andwealwayshavetoweartheschooluniform.John:Isee.Alice:Oh,andwealsohavetobequietinthelibrary.观察句子中haveto的使用，可知havet
4、o是由于客观需要而必须、不得不做某事。结构:主语＋have to＋动词原形＋其他1）一般现在时,主语是第三人称单数时,用has to。2)否定形式:主语＋don’t have to＋动词原形＋其他。观察与思考1一般现在时,主语是第三人称单数时,用doesn’thave to。Nick wear a uniform.尼克不必穿制服。doesn't have toDon’truninthehallways.Don’tfight.Whataretherules?Wemustbeontimeforclass.Ca
5、nweeatintheclassroom?No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan’t.Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn’t.Whatdoyouhavetodo?Wehavetobequietinthelibrary.GrammarFocus观察与思考2情态动词can表示能力“会,能”Canyou play the
6、guitar?你会弹吉他吗？Icandance and sing.我能跳舞又能唱歌。结构:主语＋can＋haveto意思是“必须、不得不”,它侧重于客观上的必要和外界的权威。结构:主语＋have to＋do动词原形do动词原形3a.Writetherulesfortheschoollibrary.LibraryRules1.2.3.4.Don’ttalk.Don’teat.Don’tlistentomusic.Don’ttakephotos.Run._____run.Don’tDon’twalk.Walk.
7、LookatsignsyouseeinyourdailylifeandtrytodescribetheminEnglish.3b.Usethewordstomakequestionsabouttherules.Bequiet?Q:Doesshehavetobequietinthelibrary?(she/haveto/inthelibrary)?A:Yes,shedoes.Eat?Q:______________________________________________________(he/have
8、to/inthedininghall)?A:__________________Doeshehavetoeatinthedininghall?Yes,hedoes.Listentomusic?Q:______________________________________________________(we/can/inthehallways)?A:__________________Wearahat?Q:__
