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情态动词命题趋势情态动词是初中英语里的一个重要的语法项目,也是全国各省市中考试题的考察热点考生在备战中考时,要牢记情态动词的结构和意义以及其表示推测时的用法,多做练习,在实践中加以区分含义1
①英语中的情态动词是表示说话人对某一动作或状态所持的态度、看法和感情的动词,如需要、可能、意愿、肯定或怀疑等
②情态动词具有自己的词义,但不能单独作谓语,后跟动词原形,与具有完整意义的动词一起构成复合谓语
③情态动词通常没有人称和数的变化除外,否定形式是直接加可缩写have tonot,
④常用的情态动词有:等can couldmay mightshall shouldwill wouldmust考点归纳2的一般疑问句,肯定回答用否定回答用1can Yes,…can;No,…carft例Can youplay thepiano Yes,I can的一般疑问句,肯定回答用否定回答用2may Yes,...may/Yes,of course/Yes,certainly;No,・..cant/mustnt例Might/May Ismoke inthis roomYes,you mayNo,you cant/mustnt在否定句中,意为可能不,而意为“不可能”3may not/might notcarft/couldrft例Theyoung peoplemight notlike theideaIt cant/couldnt beour headmaster.He hasgone toAmerica的一般疑问句,肯定回答为否定回答为4must Yes,…must;No,…neednt/No,...dont haveto例Must1clean theclassroom nowYes,you must.No,you donthave to/No,you neednt的基本用法5need
①need的一般疑问句,肯定回答为Yes,…must;否定回答为No,…neednt例Needhe finishthe articlenext weekYes,he must.No,he neednt
②need的情态动词,表示必要性,多用于疑问句、否定句或含有否定含义的疑问句中例Youneednt comeNeed I repairit No,you neednt
③need在作实义动词时,有三单/时态变化,前+don,t/doesrTt/didn,tNeed todo sthNeeddoing sth/need tobe done例I dont need tohave arestThis carneeds repairing=This carneeds tobe repaired6表示“不能”的can,和mustn”t表示“不能”时,意指没有能力;mustnt表示不能”时,意指禁止或不允许试比较He cantlift theheavy bagupYou mustntmake anynoise表示“必须”的和7must have to表“必须”时,意指“主观上的认识”;而意指“客观上的逼迫”试比较Must have toI muststudy hardfor thepeopleHe hadto leaveat once表示“祝福”、“祝愿”的在表示“祝福”“祝愿却寸,常将提到句首,引起倒8may may装例May yousucceed!May yoube happyfor ever!的基本用法9had better具有情态意义,可以看作是情态动词,表示劝告或建议,意为“最好”或“应该后Had better接动词原形,没有人称和数的变化否定式为had betternot例Youd bettergo tosee adoctorShed betternot goout aloneat night典例品味1Dad,must wewait untilthe lightbecomes greenYes,Im afraidwe.Thafs thetraffic ruleAcan B may Chaveto D need2Must Iwater theflowers rightnowNo,you.You maydo itafter supperAmustnt B neednt C cant3Is thatgirl SusanItbe her.She leftfor BeijingyesterdayA needntB cantC mustnt习题1I seeyour IDcard,sir Wehavetocheck yourinformationA MayB MustC ShouldD Need2Mom,must Iclean myroom nowNo,you.You cando ittomorrowA cant BneedntC mustnt D shouldnt3Have youdecided whichsenior highschool tochooseNot yet.I goto MoonlightSchoolA must Bmay C needD should4Can youstay herefor dinnerSorry,!.I havesomething importantto doAdont Bdidnt C neednt Dcant5You behungry afterthe longwalk.Help yourselfto somecakesA cantB shouldntCneedD must6NeedIfinish givingout theposters todayYes,youA needB must CcanD may7SARS isa seriousdisease,but webe afraidof itAmustBmay Cdontneedto Dhad better8Schools allowthe studentsat leastone houra dayfor sportsAwould Bmight Cshould Dcould9You smokein themeeting roomImsorryA donthad betterB hadntbetter Chad betternot Ddidnt hadbetter10Will youfinish yourwork beforenine oclockthis eveningAcan BmayCare abletoDbe ableto11You beserious!Youre actuallygoing tolend himmoney againA needntB cantC shouldntD mustnt12Mum,must Istay therethe wholedayNo,you.You comeback afterlunch,if youlikeA mustnt;can Bneednt;must Cneednt;may13You jumponto abus whileit isstill moving.It istoo dangerousAcan Bmust Ccant Dmustnt14Last yearI drive.I usedto takethe busAcould Bcouldnt Cshould Dshouldnt15I swimhereIm sorry.Children swimalone hereAMust;cantBMay;mustCCan;mustn9tDCant;can。