情态动词必修

本文格式为Word版，下载可任意编辑——情态动词必修GrammarModalverbs情态动词IUnit1Festivalsaroundtheworld情态动词的语法特征1情态动词不能单独做谓语除ought和have外后面只能接不带to的不定式2情态动词没有人称数的变化但有些情态动词如canwill也有一般式和过去式的变化cancould和beableto的用法ShecanbeabletosingthesonginEnglishThismachinecanmakeyoufeelcomfortable1canbeableto都可表示才能Can的主语是人或物beableto的主语是人WellbeabletofinishtheworksoonIhaventbeenabletoseethefilm2can只用于现在式和过去式couldbeableto可以用于各种时态could用于表示泛指过去的才能如IcouldreadwhenIwasfourAlthoughthesoldierwasbadlywoundedhewasabletotellwhathadhappenedSheranfastbutshecouldntwasntabletocatchthebus3表示特定的某一过去才能或表示告成地做了某事时只能用waswereableto不能用couldHewasabletofleeEuropebeforethewarbrokeoutHewasabletoswimhalfwaybeforehegottired表示过去的才能CouldIhavealookatyournotebookYesyoucanNoyoucant4could不表示时态表示委婉的苦求留神在回复中不成用couldCanthisnewsbetrueHowcanyoubesofoolishItcantbeMaryShehasfallenill5表示惊异质疑不相信的态度主要用于否决句疑问句和慨叹句中LindadidntcatchthetrainShecouldhavecaughtit时间过去DontworryTheycouldhavejustforgottentophone时间过去6表示揣测译为可能或许can常用于否决句意思是不成能做了和疑问句could除用于否决句及疑问句外还可用于断定句意思是本来可以IsawMrWangjustnowHecouldnthavegonetoBeijing时间过去must和haveto1Must用于一般问句中断定回复用must否决式用neednt或donthaveto做不必mustnt表示遏止不允许MustIfinishallassignmentsatatimeYesyoumustNoyouneedntYoumustntgetdownwhilethecarisstillmovingIdontlikethisTVsetWemustbuyanewoneTherewasnomorebusTheyhadtowalkhome2表示务必这个意思时must和haveto稍有识别must着重说明主观看法haveto强调客观需要另外haveto能用于更多时态YoumustbethenewteacherHemustbejokingThereisnobodyhereTheymusthaveallgonehome3must表示对某人某事的推测作准是确定一般用于断定句中对过去发生的事情作断定判断用musthavedoneMustyoumakesomuchnoise4Must表示偏要硬要指做令人不快的事情shallshould和oughttoYoushalldoasIsay命令Tellhimthatheshallhavethebooktomorrow许诺Nothingshallstopmedoingit决心1shall用于其次三人称表示许诺警告命令决心等ShallIopenthewindowforyou征求观法Shallhefetchsomewaterforyou苦求2在疑问句中用于第一三人称用来表示苦求或征求观法YoungpeopleshouldlearnhowtousecomputersEverycitizenoughttoobeylawYououghtnottogo3should常表示警告建议命令与oughtto意义相近但oughtto多表示责任义务语气猛烈在疑问句中通常用should代替oughttoYoushouldoughttohavetoldherthetruthearlier时间过去Sheshouldnthaveleftwithoutsayingaword时间过去4shouldoughttohavedone表示诽谤或批评意为本理应做到但没有做到用于否决那么表示本不该但oughtto的语气更猛烈IdontknowwhyyoushouldthinkthatIdiditwhereisBettylivingnowHowshouldIknow5WhyorHowshould表示说话人对某事不能理解感到意外惊异等意思意为竟会may和mightMayIuseyourpencilYesyoumayNoyoumustnt1may和might用于一般问句中表示委婉的苦求断定回复用may否决用mustntShemaynotbeworkingnowJohnmightbeathomenow2may和might表示可能性maymightv指现在或将来可能发生的动作处境might示意的可能性更小ShemaymighthavegonetothecinemaTheymaymightnothavereceivedourtelephone3对过去发生的事情的可能性作出判断用maymighthavedone用might比用may的可能性更小MayyousucceedMayGodblessyou4may放在句首祈使句表示祝愿Will和wouldIfyouwillhelpmewithmyEnglishIwillbeveryhappyIpromisedthatIwoulddomybest1will和would表示意愿意志可用于各种人称WillyoutellhimthenewsassoonashecomesbackWouldyoupleasespeakagainmoreslowly2在疑问句中will用于其次人称表示苦求或征求观法would那么语气更委婉1TherewerealreadyfivepeopleinthecarbuttheymanagedtotakemeaswellItacomfortablejourneyAcantbeBmustnthavebeenCshouldntbeDcouldnthavebeenDRCISES2PetercomewithustonightbutheisntverysuremustBcanCmayDwillC3WithsomuchworkonhandyoutoseethegamelastnightAmustntgoBcouldhavegoneCshouldntgoDshouldnthavegoneD4JohnnyyouplaywiththeknifeyouhurtyourselfAwontcantBmustntmayCshouldntmustDcantwouldntB5ImissedthebussoIgohomeonfootAmustBmayCcanDhadtoD完成句子1Ithemovieitllgivemehorribledreamswatch我本不理应去看那部电影的它会使我做噩梦的2Theelectricitylastnightfortheworkerswereexaminingtheelectricwirecut昨晚电断定切断了由于当时工人们正在检修线路3Ithatbitterperiodwithoutyourgeneroushelpgo没有你大气的扶助我不能熬过那段痛楚的日子4Ohmygoodne