高一英语必修3-unit1 语法

Unit1,grammar：Modalverbs,Festivalsaroundtheworld,1.can与could,（1）表示能力。（2）表示客观的可能性。（3）表示请示和允许。could较委婉。,（4）表示惊异、怀疑、不相信的态度：（用于否定、疑问和惊叹句中）“难道会，究竟”。Canthisbetrue?,(4)may/mightaswell=hadbetter最好;不妨Youmightaswellhaveatry.,（1）表示允许或征询许可。（2）表示可能性。might语气更不肯定。（3）Maysb.do!表示祝愿。,2.may与might,3.shall与should,shall用于第一、第三人称疑问句中，表示征求意见和向对方请示。用于二、三人称陈述句中，表示说给对方的命令、警告、允诺或威胁。should表示劝告和建议，“应该”。表示推测，表示某个情况是合理的，指按常理判断。表示说话人的态度，“竟然”。Icantbelievethatheshouldbesorudetooldpeople.,4.will与would,（1）表示意志或意愿。will指现在，would指过去。（2）表示请示、建议，would比will委婉。（3）表示习惯性动作，“总是，惯于”。will指现在，would指过去。（4）表示预料或猜想。,5.must与haveto,must“必须，应该”，语气强。mustnt表示“不准，不应该，禁止”。表示推测，“一定，想必”，只用于肯定句中。must表示发生了某种与说话人的愿望相反，不受欢迎的事，“偏偏，偏要”。,Whymusthedoitthatway?为什么他偏要那样做？,haveto表示“必须，不得不”。,must和haveto的区别：must一种形式；主观看法haveto有人称、时态的变化；客观需要,2.How_yousaythatyoureallyunderstandthewholestoryifyouhaveonlycoveredonlypartofthearticle?A.canB.mustC.needD.may,练习：,1.Mum，_IgooutandplaywithTomforawhile?No,Imafraidnot.Besides,itsrainingoutsidenow.A.cantB.wouldntC.mayD.wont,A,A,may表示请求。,B,can,may,could，might表示询问或征求意见的问句中，肯定应答用can或may，而否定应答时用mustnt,D,3.Itakethebookout?Imafraidnot.A.WillB.MayC.MustD.Need,4.-MayItakethisbookoutofthereadingroom?-No,you.Youreaditinhere.A.mightntB.wontC.needntD.mustnt,5.Whenhewasthere,hegotothatcoffeeshopatthecornerafterworkeveryday.A.wouldB.shouldC.hadbetterD.might,6.Johnpromisedhisdoctorhe_notsmokeandhehasneversmokedeversince.A.mightB.shouldC.couldD.would,A,D,7.-Ihaventgotthereferencebookyet,butIllhaveatestonthesubjectnextmonth.-Dontworry.You_haveitbyFriday.A.couldB.shallC.mustD.may,shall在第二人称中表示允诺。,B,8.Youcantimaginethatawell-behavedgentleman_besorudetoalady.A.mightB.needC.shouldD.would,C,9.Johnny,you_playwiththeknife,you_hurtyourself.A.wont;cantB.mustnt;mayC.shouldnt;mustD.cant;wouldnt,B,11.John,lookatthetime._youplaythepianoatsuchalatehour?AMustBCanCMayDNeed,A,12.Imissedthebus,soI_gohomeonfoot.A.mustB.mayC.canD.hadto,D,11.-Mustwedoitnow?-No,you_.A.wontB.needntC.cantD.dont,B,1.对现在(事情)推测：（情态动词+动词原形）,must+v.(肯定)may/might/could/can+v.(可能)cant+v.(不可能),情态动词表示推测的用法,2.表示对过去事情的推测或估计,musthavedone“想必或肯定已经做了某事”may/mighthavedone“可能/大概已经做了某事”cant/couldnthavedone“不可能已经做了某事”,注意：在疑问句中can/could表示对过去情况的推测，“可能已经了吗？”e.g.Someonemusthavebrokenintoourbedroom,Whocouldhavedoneit?,1.Shelooksveryhappy.She_havepassedtheexam.Iguessso.Itsnotdifficultafterall.A.shouldB.couldC.mustD.might,C,2.Youmustbeawriter,_?A.mustntyouB.areyouC.mustyouD.arentyou,D,3.Theymusthavegonetothelecture,_?A.didnttheyB.donttheyC.mustnttheyD.haventthey,D,4.Youbehungryforyouhadlunchonlyonehourago!A.wouldntB.cantC.mustntD.neednt5.She_haveleftschool,forherbikeisstillhere.A.cantB.wouldntC.shouldntD.neednt6.ItisusuallywarminmyhometowninMarch,butit_berathercoldsometime.A.mustB.canC.shouldD.would,A,B,B,8.-Lizawellnotwanttogoonthetrip-Shehatestraveling.A.willB.canC.mustD.may,7.Icantfindmypurseanywhere.Youhavelostitwhileshopping.A.mayB.canC.shouldD.would,maywell为固定搭配，意为：很可能，极有可能。,A,D,表示对过去所发生事情的遗憾或责备,1.should/oughttohavedone“过去本该做而没做”2.shouldnt/oughtnttohavedone“过去不该做的事却做了”3.could/mighthavedone“本来能够做的事却没做”eg:Hecouldhaveworkedouttheproblem.,4.neednthavedone“原本不必做的事却做了”eg:Youneednthaveleftinsuchahurry.,Heneednthavecome.Hedidntneedtocome.,他本没有必要来（实际也没来）,他本没有必要来（实际却来了）,5.didntneedtodo/didnthavetodo“没有必要做，实际也没做”,1.Iwasreallyanxiousaboutyou.You_homewithoutaword.A.mustntleaveB.shouldnthaveleftC.couldnthaveleftD.needntleave,2.Thankyouforyourhardworklastweek.Idontthinkwe_itwithoutyou.A.canmanageB.couldhavemanagedC.couldmanageD.canhavemanaged,B,B,4.Whatapity!Consideringhisabilityandexperience,he_better.A.needhavedoneB.musthavedoneC.canhavedoneD.mighthavedone,3.Catherine,Ihavecleanedtheroomforyou.Thanks.You_it.Icouldmanageitmyself.A.needntdoB.neednthavedoneC.mustntdoD.shouldnthavedone,B,D,5.H