Howmanymodalverbscanyoulist?情态动词没有人称和数的变化，有词义，但是不完整，不能单独做谓语，必须和不带to的动词不定式连用。abilitycertaintypermissionobligationmakerequestsmakesuggestionsmakeoffersgiveadvice能力义务,责任允许提出请求提出建议提供帮忙提出忠告确定CompletePartA&BonP29accordingtotheintroductiononP28.CompletePartA&BonP31accordingtotheintroductiononP30.(1)Hecanrunthe100metresin11seconds.(2)Canthislittlegirlreadbeforeshegoestotheprimaryschool?can表示可能性时，指的是理论上的可能，它通常不用来表示某事实际发生的可能性或真实性。如：Accidentscanhappen.Anybodycanmakemistakes．can/beableto在过去时态的肯定句中需要某种条件或努力做成某事，我们要用was／wereableto而不能用could。如：Itwasaholidayandthechildrenwereabletogototheseaside．Thegirlworkedhardsoshewasabletopassthefinaltest．I’msorryIhaven’tbeenabletoplaytenniswithyourecently.can/beabletoWemustworkhard,orwe’llfailintheexamination．Twoyearsago,thepoorgirlhadtoleaveschoolforlackofmoney．must与haveto都可以表示“必须”的意思，但要注意以下两点区别。1)must只有现在时，而haveto有现在时、过去时和将来时,也可与will连用。如：haveto/mustWemustbestrictwithourselvesineverything．Incitieswithmanycars,somepeoplehavetowearmasks．2)must表示主观看法，haveto则侧重于客观需要。如：haveto/mustshall可以用来征求对方意见。用于第一、三人称。此外它也可以用来表示说话人的命令、警告、允诺、威胁或决心等，这时它用于第二、三人称。如：Shallshegototheconcertwithusthisevening?(征求意见)Youshallgotothefrontatonce．(命令)Don’tworry．Youshallgettheanswerthisveryafternoon．（允诺）Heshallbesorryoneday.Itellyou.(警告)shall作为情态动词时，两个词常用于疑问句和否定句。—NeedIhelpyou?—Yes,please.Youneedn’ttelephonehimnow.Howdareyoutalktotheteacherlikethat?Thegirldarenotgooutaloneatnight.need/dareneed/dare用作实义动词时，可用于各种句式．Weneedtotellhimthenews.Youdon’tneedtotellhimthenews.Dotheflowersneedwatering?Ididn’tdaretotellyouthetruth.Wouldyoudaretocatchthesnakewithyourhand?Theboydarestodoanythinghelikes.Theboysmaybeplayingfootballontheplayground.Theboysmayhavefinishedtheirhomeworkbythetimeschoolisover.Youneedn’thavetakenataxi,foritwasneartomy.OurheadmastermusthavebeentoUSA,forheknowsthecountrysomuch.和其他时态的连用Youmusthaveseenthefilm,haven’tyou?Youmusthaveseenthefilmlastweek,didn’tyou?Hisparentsmusthavebeatenhim,haven’tthey?Hisparentsmusthavebeatenhimyesterday,didn’tthey?musthavedone的反意疑问句2.How___yousaythatyoureallyunderstandthewholestoryifyouhavecoveredonlypartofthearticle?A.canB.mustC.needD.may1.Aleft-luggageofficeisaplacewherebags____beleftforashorttime,especiallyatarailwaystation.A.shouldB.canC.mustD.willBA3.—Theroomissodirty.____wecleanit?—Ofcourse.A.WillB.ShallC.WouldD.DoB4.MyEnglish-Chinesedictionaryhasdisappeared.Who___havetakenit?A.shouldB.mustC.couldD.wouldC5.—Ihearyou’vegotasetofvaluableAustraliancoins.___Ihavealook?—Yes,certainly.A.DoB.MayC.ShallD.ShouldB6.Iwasreallyanxiousaboutyou.You___homewithoutaword.A.mustn’tleaveB.shouldn’thaveleftC.couldn’thaveleftD.needn’tleaveB8.Sorry,I’mlate.I____haveturnedoffthealarmclockandgonebacktosleepagain.A.mightB.shouldC.canD.willA7.Johnny,you______playwiththeknife.You______hurtyourself.A.won’t;can’tB.mustn’t;mayC.shouldn’t;mustD.can’t;shouldn’tB9.—WhencanIcomeforthephotos?Ineedthemtomorrowafternoon.—They___bereadyby12:00.A.canB.shouldC.mightD.needB10.---MustIdrivetohishouseandpickupthechildren?---No,___.A.youshouldn'tB.youmightnotC.youneedn‘tD.youmustn'tC11.Whenhewasthere,he___gotothatcoffeeshopatthecornerafterworkeveryday.A.wouldB.shouldC.hadbetterD.mightA12.Thatbigcinema______seat2,000people.A.canB.shouldC.oughttoD.isabletoACompleteC1&C2onPage100.
