高一英语情态动词情态动词是高考的重点考查项目，对学习情态动词的要求是：首先、了解情态动词各自的基本意义及用法，然后掌握情态动词表示推测的用法（其中重点是对表过去推测的用法）还要注意带有情态动词的反意疑问句的用法。情态动词的特征：1.本身有词义，但完全。因此不能独立作谓语，只能和动词原形一起构成谓语。2.后接动词不定式一律不带to3.不随人称和数的变化。情态动词各自的基本意义及用法表一、can与could用法对比表对比点cancould1、表“能力”Canyouliftthisheavybox?Icouldn’tunderstandwhathesaidatall.2、表“许可”Youcanuseadifferentmaterialinstead.HesaidIcouldborrowhisbike.3、“怀疑”No,no,itcan’tbetrue.Whatonearthcanthismean?Wethoughtthestorycouldnotbetrue.Howcouldyoubesocareless?4、can与beableto区别1.could代替can，表示语气更为婉转。Eg.CouldIuseyourbike?Yes,Ican2.can(能够)=beableto(仅表能力时)，但beableto表示一番努力后，才能做得到，且有更多的时态。Hewasagoodswimmer,sohe__________swimtotheriverbankwhentheboatsank.A.couldB.mightC.shallD.wasableto表二、may与might用法对比表对比点mayMight1．表“询问”MayI…?(=CanI…?)MightI…?(=CouldI…?)(但比用may更客气)2.表“允许”Youmaytaketheboythere.Hetoldmehemightcome.(might与told相呼应)3．表“可能”“或许”Shemaynorlikethisplace.I’mafraidhemightnotlikethisplay.注：1.MayI…?的答语。2.may可表示期望或祝愿Mayyousucceed!3.may(might)用于目的状语从句中肯定：Yes,youmay.否定：No,youmustn’t不行（语气强硬）No,youmaynot或No,you’dbetternot.Theemperorgavethemsomegoldinorderthattheymightbegintheirworkatonce.表三、must与haveto的用法对比表对比点musthaveto1．表“必须”（主观看法）必须；没有过去（客观需要）不得不，有多种时用心爱心专心117号编辑1式，可用于间接引语中。HetoldmeImustdoaccordingtowhathesaid.态。It’srainingheavily,wecan’tgonow.2.疑问句MustI…?Yes,youmust.（一定）No,youneedn’t./youdon’thaveto.(不必)Doyouhavetogotoday?Yes,wedo.否定句：Youdon’thavetoworryaboutthat.表四、need与dare的用法对比表对比点needdare1.情态动词+动词原形1）否定式2）疑问式Heneednot(needn’t)go.----Needwedoitagain?---No,youneedn’tdoitagain.Hedarenotsayso.Dareshegooutaloneatnight?HowdareyousayI’munfair?Ifhedaredothat,he’llbepunished.(条件句)Idaresay.(固定用法)2.行为动词+带to不定式1）肯定式2）否定式3）疑问式Heneedstogo.Hedoesn’t(doesnot)needtogo.Doesheneedtodoitagain?No,hedoesn’tneedotdoitagain.Hedarestosay.Hedoesnot(doesn’t)daretosay.Ifyoudaretojumpintothewaterfromhere,sodareI.3.didnotneedtodo表示过去没有必要做Shedidn’tneedtoattendthemeetingyesterday,andshestayedwithherchildren.(她没有参加)表五、should与oughtto用法对比表对比点shouldoughtto1、表“应该”表劝告、建议Youshouldlistentothedoctor’sadvice.WeshouldlearnfromZhangHua表示“有责任有必要”做某事Yououghttofinishyourworkbeforeyougohome.Weoughttohelpeachother.2、表“估计”Theyshouldgethomebynow.表示“非常可能”的事，可译为“总应该”Ifwestarttoworkrightnow,weoughttofinishitbeforelunch.(午饭前应当能干完)注：1）、should还可在虚拟语气中的使用2).注意：oughtto的疑问式及否定式用心爱心专心117号编辑2----Oughthetogo?----Yes,Ithinkheoughtto.No,heoughtn’tto.否定式：oughtnottoa或oughtn’ttodo(不说oughttonotdo)反疑问句：oughtn’t______?表六、shall与will的用法对比表shallWill1.征询对方意见或请求指示，用于第一、三人称：ShallI(we)…?Shallhe(she)…?WhereshallI(we)waitforyou?1．询问对方的意思或向对方提出要求：Willyou(please)…?Won’tyou…?Wouldyouliketo…?(用would替代will更客气)----Won’tyougoandseethefilm?你不去看电影吗？---Yes,IthinkIwill.不，我想...
