Unit6 Grammar

Unit6,OxfordEnglish,Module3Naturalelements,Electricity,Grammar,Period3,Modalverbs,Grammar,Whataremodalverbs?,Acanandcannot,Weusethemodalverbscanandcannot(cant)tosayweareableorunabletodosomething.,Wecanuseelectricitytomakemanythings.Wecannot/cantseeelectricity.Canyouthinkofanexample?Yes,Ican./No,Icannot/cant.,can表示具有某种能力,意为“能；会”相当于beableto。can表示许可,意为“可以”，相当于may。它的否定形式是cannot/cant。can构成的一般疑问句的回答形式为:CanI？Yes,youcan./No,youcannot/cant.,Usethefollowingsentence“Ican”totellothersyourspecialability.Forexample:Icanboldmybreathfortwominutes.,HiandLoaretalkingaboutthemselves.Whataretheysaying?ReadtheirconversationandthencompletethestatementsbelowwithCanorCannot.,1.Hi_playfootball.2.Lo_paint.3.Hi_speakasmanylanguagesasLo.4.BothHiandLo_dance.5.Lo_driveacar,buthe_playchess.6.Hi_swim,buthe_playtheguitar.,can,can,can,can,cannot,cannot,cannot,cannot,Bmayandmaynot,Weusemayandmaynottoaskforandgivepermission.Inlessformalsituations,somepeopleliketousecanandcannot(cant)forthesamepurpose.,May/CanIuseyourmobilephone？Yes,youmay/can.No,youmaynot/cant.,Youmay/canturnontheTV.Youmaynot/cannotplayinthekitchen.,may表示许可或请求对方允许，意为“可以；可能；或许”；否定形式为maynot,意为“不可以”。除了maynot以外,cant、mustnt都可以表示“不可以”。但mustnt语气更强。may构成的一般疑问句的回答形式为：MayI.?Yes,youmay./No,youmaynot.,maybe和maybe的区別:maybe是“情态动词+系动词be”结构，表示“可能是”,maybe作副词；表示“大概；也许”。例如：Hemaybeintheroom./Maybeheisintheroom.,Agame:whatwouldyousay?,Youwillbegivenseveralsituations.Afterreadingthedescriptionsandlookingatthepictures,decidewhatyouwouldsayinthesesituations.,Amanisgoingtoseehisboss.Heisstandingatthedoorway.,MayIcomein?,b.Astudentisgoingtoasktheteacheraquestion.,MayIaskyouaquestion?,c.Aboyisthirsty.Heisaskinghismotherforsomething.,MayIhavesomewater?,d.Ashopassistantisservingacustomer.,MayIhelpyou?,Daisyisnotfeelingwelltoday.Bennyisathomewithher.Readtheirconversationbelow.Filltheblankswithmayorcan.,Benny:Howareyoufeeling,Daisy?Daisy:Notverywell.Benny:_Igetyouachair?Daisy:Yes,thanks.Benny:Imgoingout._Iborrowyourbicycle,Daisy?,Daisy:Yes,youmay.Beforeyougotomeetyourfriends,canyoucomeandseethedoctorwithme?,May,May/Can,Benny:Yes.I_._Icarryyourbagforyou?Daisy:Yes,youmay.Thatssokindofyou,Benny.Imreadytogo._youopenthedoorforme?Benny:Yes,Ican.Daisy:Thanks.,May,Can,Can,Cmustandmustnot,Weusemustandmustnot(mustnt)totellpeoplewhattodoorwhatnottodo.,Youmustnot/mustntdothat,Benny.Wemustalwaysbecarefulwithelectricity.Theymustnot/mustntplayneartheheater?,Aftermodalverbssuchascan,mayandmust,weuse(thebaseform/theingform/theedform)ofaverb.,Workouttherule,must用来制定规则或发出命令，意为“必须”。使用must的句子常常具有某种强制力。must的否定形式是mustnot/mustnt,表示绝对禁止，意为“不准”。must的一般疑问句的回答形式为：MustI？Yes,youmust./No,youneednt.,Whatdothesesignsmean?,（Youmustntsmokehere.）,（Youmustntclimbthisladder.）,（Youmustntswimhere.）,（Youmustntuseyourmobilephonehere.）,Daisysawadoctor.Thedoctortoldherwhattodoandwhatnottodo.Helpherwritedownthedoctorsinstructions.,drinkmorewatergotobedearlyeatcoldfoodsharecupswithothersgooutalonetakethemedicineontime,Imustdrinkmorewater._Imustnot_,Imustgotobedearly.,Imusttakethemedicineontime.,eatcoldfood.,Imustnotgooutalone.,Imustnotsharecupswithothers.,我会游泳但玛丽不会。I_butMary_.2.我八点之前必须完成作业。I_myhomeworkbeforeeightoclock.3.我可以进来吗，陈老师？_comein,MissChen?4.你不可以在这里打篮球。You_here.,canswimcannot,mustfinish,MayI,mustntplaybasketball,I.根据中文意思完成句子。,Exercises,1.-MayIwatchTV,Dad?-No,you_.Youmustfinishyourhomeworkfirst.A.mustntB.maynotC.couldntD.mightnot2.-_youcarrythebagbyyourself?-Yes,Ican.A.MustB.CanC.ShouldD.May3.You_throwrubbisheverywhere.A.mustntB.cantC.maynotD.couldnt,II.单项选择。,A,B,A,4.-_Iborrowthesemagazines?-Sorry,onlythemagazinesovertherecanbeborrowed.A.NeedB.wouldC.MustD.May5.Itsthelibrary!