Unit 4Don’t eat in class.Section APeriod 2 (2d-3c)

Unit4,Donteatinclass.,SectionAPeriod2(2d-3c),LibraryRules,Donttalk.,Dontdrinkoreat.,Dontlistentomusic.,Donttakephotos.,3a,LibraryRules,1.Notalking!2.Nofood!3.Nolisteningtomusic!4.Nophotos!,haveto（不得不）的用法,1.haveto句式,肯定式:have/hasto+动词原形,Wehavetoleavenow.ShehastoworkonSunday.,否定式:dont/doesnthaveto+动词原形,一般疑问式:Do/Does+主语+haveto+动词原形+?,Youdonthavetowalksofast.Hedoesnthavetobuyanewcoat.,-DoyouhavetostudyEnglishnow?-Yes,Ido.-Doeshehavetogonow?No,hedoesnt(haveto).,特殊疑问句:疑问词+do/does+主语+haveto+动词原形+?,Whatdoyouhavetodoknow?Wheredoesshehavetogo?,2.haveto与must的区别,haveto着重于客观的需要,含有不得不的客观强制性;must着重于主观上自己认为有义务,有必要.,Shehastocleantheclassroomeveryweek.Imustgonow.,在否定句中,donthaveto表示没有必要,mustnot表示不允许.,Youdonthavetogothere.Youmustntplayfootballontheroad.,你不必在上午七点前到校。Youdonthavetobeschoolbefore7:00.他们在学校必须做什么呢？Whatdotheyhavetodoatschool？我们要保持安静。Wehavetobequiet.,TranslatethesesentencesintoEnglish.（翻译）,用haveto或hasto填空。1.We_cleanourclassroomafterschool.2.She_makeherbedaftergettingup.3.Itslate.MrBeckman_gotoworkbycar.4.EmilyandPeterjoinamusicclub.They_practicetheguitareveryday.5.DoesTom_getupearlyeverymorning?,haveto,haveto,hasto,hasto,haveto,can能，能够（表示许可）CanIsithere?No,youcant.我可以坐这儿吗？不,你不能。can能，会（表示能力）Canyouplaybasketball?Yes,Ican.你会打篮球吗？是的,我会。,根据句意，用can和cant填空。1.MrGreen_smokeherebecausetheresasignonthewall.Itsays“Nosmoking.”2.Itsveryhotoutside.You_wearahat.3.We_eatintheclassroombecauseitsimpolitetoteachers.4.I_gotobedafter11:00onschoolnight.5.Thestudents_readbooksandmagazinesinthelibrary.,cant,can,cant,can,cant,3bUsethewordstomakequestionsabouttherules.Thenwriteanswersaccordingtoyourschool.,Bequiet?Q:_(she/haveto/inthelibrary)?A:_Eat?Q:_(he/haveto/inthedininghall)?A:_,Doesshehavetobequietinthelibrary?,Yes,shedoes.,Doeshehavetoeatinthedininghall?,Yes,hedoes.,Talkaboutyourschoolday.Whatcanyoudoandwhatdoyouhavetodo?Thenmakealist.,3cMakeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestS