Unit4Don’teatinclass.SectionAPeriod2(2d-3c)LibraryRulesDon’ttalk.Don’tdrinkoreat.Don’tlistentomusic.Don’ttakephotos.3aLibraryRules1.Notalking!1.Notalking!2.Nofood!2.Nofood!3.Nolisteningtomusic!3.Nolisteningtomusic!4.Nophotos!4.Nophotos!havetohaveto（不得不）（不得不）的用法的用法1.1.havetohaveto句式句式肯定式肯定式:have/hasto+:have/hasto+动词原形动词原形Wehavetoleavenow.Wehavetoleavenow.ShehastoworkonSunday.ShehastoworkonSunday.否定式否定式:don’t/doesn’thaveto+:don’t/doesn’thaveto+动词原形动词原形一般疑问式一般疑问式::Do/Does+Do/Does+主语主语+haveto++haveto+动词原形动词原形++…?…?Youdon’thavetowalksofast.Youdon’thavetowalksofast.Hedoesn’thavetobuyanewcoat.Hedoesn’thavetobuyanewcoat.--DoyouhavetostudyEnglishnow?--Yes,Ido.--DoyouhavetostudyEnglishnow?--Yes,Ido.--Doeshehavetogonow?–No,hedoesn’t(haveto).--Doeshehavetogonow?–No,hedoesn’t(haveto).特殊疑问句特殊疑问句::疑问词疑问词+do/does++do/does+主语主语++haveto+haveto+动词原形动词原形++…?…?Whatdoyouhavetodoknow?Whatdoyouhavetodoknow?Wheredoesshehavetogo?Wheredoesshehavetogo?2.haveto2.haveto与与mustmust的区别的区别havetohaveto着重于客观的需要着重于客观的需要,,含有含有不得不不得不的客观的客观强制性强制性;must;must着重于主观上自己认为有义务着重于主观上自己认为有义务,,有有必要必要..Shehastocleantheclassroomeveryweek.Shehastocleantheclassroomeveryweek.Imustgonow.Imustgonow.在否定句中在否定句中,don’thaveto,don’thaveto表示表示没有必要没有必要,,mustnotmustnot表示表示不允许不允许..Youdon’thavetogothere.Youdon’thavetogothere.Youmustn’tplayfootballontheroad.Youmustn’tplayfootballontheroad.你不必在上午七点前到校。Youdon’thavetobeschoolbefore7:00.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.It’slate.MrBeckman______gotoworkbycar.4.EmilyandPeterjoinamusicclub.They_______practicetheguitareveryday.5.DoesTom________getupearlyeverymorning?havetohavetohastohastohavetocan能，能够（表示许可）—CanIsithere?—No,youcan’t.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can’t填空。1.MrGreen_______smokeherebecausethere’sasignonthewall.Itsays“Nosmoking.”2.It’sveryhotoutside.You______wearahat.3.We_______eatintheclassroombecauseit’simpolitetoteachers.4.I______gotobedafter11:00onschoolnight.5.Thestudents_____readbooksandmagazinesinthelibrary.can’tcancan’tcancan’t3bUsethewordstomakequestionsabouttherules.Thenwriteanswersaccordingtoyourschool.Bequiet?Q:___________________________________(she/haveto/inthelibrary)?A:___________________________________Eat?Q:___________________________________(he/haveto/inthedininghall)?A:___________________________________Doesshehavetobequietinthelibrary?Yes,shedoes.Doeshehavetoeatinthedininghall?Yes,hedoes.Talkaboutyourschoolday.Whatcanyoudoandwhatdoyouhavetodo?Thenmakealist.3cMakeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestSchool!Wecanwalkoutoftheclassanytimewewant.Wecanwearwhatwewant.Wemayhavelesshomeworkandmorefreetime.…
