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Unit4Don’teatinclass.Don’teatinclassSectionAGrammarFocus-3c1.IsJohnnewatschool?___________2.Aretheremanyrulesatschool?______________Recite2donpage20andanswerthequestions.Yes,heis.Yes,thereare.3.Canhebringmusicplayerstoschool?_______________4.Dotheyhavetoalwaysweartheschooluniform?_______________5.What’sthelibraryrule?___________________________No,hecan’t.Yes,theydo.Wehavetobequiet.TolearnImperativesDon’t…Don’truninthehallways.Tolearntousecanforpermission:Canweeatintheclassroom?Tolearntousemodalverbshaveto&mustWehavetobequietinthelibrary.Wemustbeontimeforclass.Don’t________________!LookandsayDon’t_____.fightDon’t_________________.runinthehallwayseatintheclassroomDon’t_____________class.arrivelateforDon’t___________________!listentomusicinclassObserveandlearnDon’teatintheclassroom.Don’tfight.Don’truninthehallways.Don’tarrivelateforclass.Don’tlistentomusicinclass.Haveathink:祈使句是怎样构成的？一般在什么情况下会用祈使句？Don’t…不要做……祈使句一般用于上级对下级，长辈对晚辈之间，表示命令、劝说或警告，也可表示请求。*主语一般为第二人称，但通常省略。*肯定式一般以动词原形开头，否定式通常在动词原形前加don’t。*为使祈使句更委婉、有礼貌，可在祈使句开头或末尾加please。*句末一般用句号，表示强烈语气时用感叹号。1.肯定祈使句的常见句型结构：①Do型：动词原形+宾语+其他.Openthedoor,please.②Be型：Be+表语.如：Beagoodboy!③Let型：Let+宾语+动词原形+其他.Let’s+动词原形+其他.Letmehelpyou.Let’splaytennis.祈使句的句型结构2.否定祈使句的常见句型结构：①Do型和Be型的否定式：Don’t+动词原形/be+其他.Don’tforgetme.Don’tbelate.②Let型的否定式：Don’t+let+宾语+动词原形+其他.Let’s+not+动词原形+其他.Don’tlethimgoback.Let’snotgoswimming.③警示语：No+名词/动词-ing形式.Notalking.将下面的句子改为祈使句，每空一词。1.Youcancomein._________,please.2.Icanhelpyou.____me_____you.3.Youcan’teatinclass.__________inclass.4.Youcan’tbelateforschool.__________lateforschool.5.Youcan’ttalkinthelibrary._____talkinginthelibrary.ComeinLethelpDon’teatDon’tbeNoDon’truninthehallways.Don’tfight.Whataretherules?Wemustbeontimeforclass.Canweeatintheclassroom?No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan’t.Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn’t.Whatdoyouhavetodo?Wehavetobequietinthelibrary.GrammarFocus2.can在本单元主要表示什么含义？它还可以表达什么意思？1.圈出情态动词，情态动词在用法上有什么共同点？3.haveto在句法上与其他的情态动词的区别?1)本单元can意为“可以”，表示请求、允许Icandanceandsing.情态动词can2)can还可表示能力，“能，会”-Canthestudentsruninthehallways?-Yes,theycan./No,theycan’t.Wecan’teatintheclassroom.肯定:主语+can+动词原形+其他.否定：主语+cannot/can’t+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+can’t.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.情态动词mustYoumustcomeintime.你必须按时来。Meatmustbecookedthoroughly.肉必须彻底煮熟。情态动词havetohaveto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。They_______weartheuniformeveryday.-Yes,______.Lookandsay-Doyou___________theuniformeveryday?haveto-No,________.wedowedon’thavetowearShe_______dohomeworkeveryday.hastoI_____________mybedroomonweekends.havetoclean1.我们可以在教室里吃东西吗？_____________________________2.不能。但我们可以在餐厅里吃东西。________________________________________________________________3.我们可以在上课的时候带帽子吗？_____________________________4.我们必须按时上课._______________________________Canwewearahatinclass?No,wecan’t,butwecaneatinthedininghall.Canweeatintheclassroom?Wemustbeontimeforclass.阅读GrammarFocus部分，完成下列句子。5.他在学校里必须穿校服吗？__________________________________6.是的，必须。/不，不必。_______________________________7.你们必须做什么？_______________________________8.在图书馆里我们必须保持安静。_________________________________Yes,hedoes./No,hedoesn’t.Doeshehavetowearauniformatschool?Whatdoyouhavetodo?Wehavetobequietinthelibrary.LibraryRules1.Don’ttalk.2.__________________3.__________________4.__________________5.___________________3aWritetherulesfortheschoollibrary.Don’tlistentomusic.Don’teatordrink.Don’ttakephotos.Don’tsmoke.1.Bequiet?(she/haveto/inthelibrary)Q:Doesshehavetobequietinthelibrary?A:Yes,shedoes.3bUsethewordstomakequestionsabouttherules.Thenwriteanswersaccordingtoyourschool.2.Eat?(he/haveto/inthedininghall)Q:________________________________?A:_____________3.Listentomusic?(we/can/inthehallways)Q:________________________________?A:_____________4.Wearahat?(we/can/intheclassroom)Q:_____________________________?A:____________Thenanswerthequestions.Yes,hedoes.DoeshehavetoeatinthedininghallCanwelistentomusicinthehallwaysNo,wecan’t.CanwewearahatintheclassroomNo,wecan’t.Atmydreamschool,wedon’thavetocometoschooleveryday.…Wecaneatinclass.…3cMakeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestSchool!Atmydreamschool,wedon’thavetocometoschooleveryday.Wecaneatintheclassroom.Wecanlistentomusicinclass.Wedon’thavetodohomework.Wedon’thavetowearschooluniformsatschool.Don’truninthehallways.Wemustbeontimeforclass.-Canweeatintheclassroom?•No,wecan’t,butwecaneatinthedininghall.•Doeshehavetowearauniformatschool?•Yes,hedoes./No,hedoesn’t.•Whatdoyouhavetodo?•Wehavetobequietinthelibrary.课时重点回顾用所给单词的适当形式填空。1.Don’t________(listen)tomusicinthelibrary.2.Dowehaveto______(clean)theroomeveryday?3.Youcan’t________(wear)sunglassesintheclassroom.4.Please________(arrive)atschoolontime(准时).listencleanweararrive3.Youcan’twearahatinclass.(改为祈使句)__________ahatinclass.4.Hehastoseehisgrandparentsonweekends.(对划线部分提问)What_____he______