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1、Unit2InEngland,youusuallydrinkteawithmilk.Wemustopenagiftlater.Wemustacceptagiftwithbothhands.Wemustuseredpaperforhongbao.wemustn’tdoanycleaningonthefirstdayoftheSpringFestival.We’dbetternothaveourhaircutduringtheSpringFestivalmonth.Wemustn’tbreakanything.somedifferencesbetweenChi
2、naandtheUSChinatheUSTheycanopenthegiftimmediately.Theyneedn’twait.Theyneedn’tacceptagiftwithbothhands,theycanuseonehand.somedifferencesbetweenChinaandEnglandChinaEnglandgreetingsmannersatthebusstopTheymustsayMrorMrswhentheymeetsomeoneforthefirsttime.Whentheymeetfriends,theycanuset
3、heirfirstnames.Wemayshakehandsorsmileateachotherwhenwemeetforthefirsttime.Theymuststandinalineandwaittheirturn.Theymustn’tpushtheirwayontothebus.Wemaypushourwayontothebus.用法:1.表示请求或允许:MayIgohome，please?注意：在疑问句中不用于第二人称2.表示可能性:Youmayberight.—No,you_________{may/might—Yes,youmay.注意：m
4、ight为may的过去式，但也可以代替may，语气较为婉转客气或更加不肯定。mustn’t/youcan’t.情态动词may,might,can,must,need的用法用法:1.表示能力:HecanspeakalittleEnglish.Canyoufly?3.表示请求或允许:CanIhelpyou?2.表示猜测:ThatcannotbeourEnglishteacher,becauseshehasgonetoShanghai.注意：could也可表示请求，语气委婉，主要用于疑问句，不可用于肯定句，答语应用can。CouldIcometoseeyouto
5、morrow?Yes,youcan.（否定答语可用No,I'mafraidnot.）{{{can情态动词may,might,can,must,need的用法多用于否定句用法:2.表示推测“肯定，一定”:1.表示必须或命令:Youmustcomeearlytomorrow．—MustIfinishmyhomeworkfirst?Theymustbeathome.Thelightison.—Yes,youmust.—No,youdon'thaveto/needn't.{注意：must开头的疑问句，其否定回答通常用don‘thaveto或needn’t，而不用m
6、ustn‘t.3.否定时表示“禁止”:Youmustn’tsmokehere.mustmustn’t情态动词may,might,can,must,need的用法[注意]⑴在表示客观需要时一般用haveto(不得不)，而不用must。It’srainingheavilysowehavetostayathomeanddosomereading.⑵在表示能力时，can可以和beableto互换,后者有人称变化和更多的时态变化。Hewasabletomendthemachineat18.Mybrotherwasveryill,soI()callthedoctori
7、nthemiddleofthenight.Hesaidthatthey()workhard.hadtomustExercises:用法:既可以做情态动词,也可以做实义动词2.实意动词(needtodosth):1.情态动词(needdosth)—DoIneedtobuyabighouse?Heneedstobuyabighouse.NeedIbuyabighouse?—Yes,youmust.—No,youneedn’t/don’thaveto.(不必要)—Yes,youdo./--No,youdon’t.{{need情态动词may,might,can,m
8、ust,need的用法()1.—Who’ssinginginthe
