Unit+4+Exploring+literature+Grammar+and+usage+Modal+verbs+情态动词+课件-【知识精讲精研】高中英语译林版(2020)必修第二册

ModalverbsWhatshallIread?DoubanbookreviewPeople'sDailyMinistryofEducationReadthewebsitearticleonpage48tocompletethemindmapbelow.Lookforbooksontopicsthat

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yourselfbetterabletoseekoutbookstoyourtasteandenjoyreadingallthemore.shouldpointmustdecidedonothavetoreadmayfindsuggestionabilitynecessitypossibility1.WhatshallI

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oughttoread.5.Teachersinparticularcanprovidesuggestionsforinterestingreadingmaterialsthatcanbefoundinthelibraryorbookshopeasily.suggestionpossibilitysuggestionnecessityabilitysuggestionabilitynecessitypossibility6.Youcouldalsoreadbookreviewsinnewspapers,inmagazinesoronline.7.Abookreviewcanoftentellyouwhetherabookisworthreadingornot.8.Theseideasshouldpointyouintherightdirection.9.However,youmustalsodecideforyourselfwhatkindofbookstoread.10.Youdonothavetoreadabookjustbecauseeveryonerecommendsit.11.Overtime,youmayfindyourselfbetterabletoseekoutbookstoyourtasteandenjoyreadingallthemore.suggestionabilitypossibilitynecessitynecessitynecessity1.suggestionshall/can/could+动原2.abilitycan+动原3.necessityoughtto/must/don’thaveto+动原4.possibilitymighthavedoneshould/may+动原adef情态动词1.本身有词义，不能单独作谓语。2.与动词原形构成谓语。3.表示说话人的情绪、态度、语气。常见情态动词1.只做情态动词may(过去式might)must2.可做情态动词/实义动词(有人称数的变化，后不加动词原形)can(过去式could)-能够need-需要dare-敢于3.可做情态动词/助动词(构成时态、语态、疑问句、否定句)will(过去式would)shallshould4.具有情态动词特征：haveto，usedto，oughtto情态动词+havedone的用法1.can/could/may/mighthavedone表推测过去可能发生的事情。Tomcanhavebeenhurtseriouslyinthecaraccident.2.musthavedone表推测过去一定发生的事，“一定做过”Lindamusthavegonetoworkbybus,becauseherbikeisstillthere.3.should/oughttohavedone(语气强烈)“本应该做未做”虚拟语气Youshould

havebeenmorecarefulinthisexperiment.4.needn’thavedone“本没必要做却做了”虚拟语气Idressedverywarmlyforthetrip，butIneedn’thavedoneso.Theweatherwashot.情态动词+havedone的用法5.IfIwereyou,Iwoulddo...6.couldhavedone本能做却未做7.shouldn’thavedone本不该做却做其他1.Thenewscan’tbetoogoodtoher.对...太...2.couldn’tbebetter再好不过3.I’mready,sowemightaswellgonow．不妨4.needdoing=needtobedone某事需要被做5.didn'tneedtodo过去不必做某事,事实上也没做needn'thavedone过去不必做某事,但事实上做了。6.must非要；偏偏mustn’t禁止，不允许can’t否定推测√√√√√√√√√√√Pharses1.不止一次2.