高二英语情态动词课件

HighSchoolEnglishModalVerbCoursewareOverviewofModalVerbsUsageofneed,should,andtodayTheusageofto,could,may,andcanTheusageofright,right,will,andwould目录Theusageof"shall"and"can"Specialusageandprecautionsofmodalverbs目录01OverviewofModalVerbsDefinitionModalverbsareverbsthatexpresssuggestions,demands,necessity,possibility,andothermeanings,usedtoexpressthespeaker'sattitudeoropinion.FunctionModalverbsareusuallyusedinconjunctionwithauxiliaryverbsinsentencestoformcompoundpredicatesandexpressrichermeanings.DefinitionandFunctionModalverbscanbedividedintofourcategories,including"capableandwilling","necessary","possible",and"speculative".ClassificationCan/couldinclude"can/could"and"may/light";Thenecessarycategoriesinclude"must"and"need";Possibleclassesinclude"shall/should"and"will/would";Speculativeclassesinclude"rightto"and"haveto".SpecificvocabularyClassificationofModalVerbsNegativeformThenegativeformofmodalverbsistoaddthenegativeword"not"afterthemodalverb,suchas"cannot","maynot","neednot","shallnot",etc.UsageThenegativeformisusedtoexpressthenegativemeaning,emphasizingprohibitions,prohibitions,orimpossibilities.TheNegativeFormofModalVerbs02Usageofneed,should,andtodayThissectionfocusesontheusageofthemodalverb"need"indifferentcontextsSummaryUse"need"inthepresentsimpletensetoexpressacurrentnecessityorrequirementExample:"Ineedtofinishthisproject."NeedinPresentSimpleUse"need"inthepresentcontinuoustensetoexpressanongingrequirementExample:"Iamneededhelpwiththisproject."NeedinPresentContinuousUse"need"inthepresentationperfecttensetoexpressaneedthathasbeensatisfiedinthepastExample:"Ihaveneededhelpwiththisprojectforalongtime."NeedinPresentPerfectUsageofneedSummary:Thissectionexplorestheappropriateuseofthemodalverb"should"indifferentscenariosShouldinRecommendations:Use"should"tomakearecommendationorsuggestanoptionExample:"Youshouldtrythisnewrestaurant."ShouldinAdvice:Use"should"togiveadviceorguidanceExample:"Youshouldalwayswearahelmetwhenridingabike."ShouldinExpressingExpectations:Use"should"toexpressanexpectationornormExample:"Studentsshouldbeattentiveinclass."UsageofshouldSummaryThissectiondelvesintothenumbersofusingthemodalverb"dare"indifferentcontextsDareasaHelperVerbUse"dare"asaHelperVerbtoexpressbraveryorboldnessExample:"Hedarestospeakinpublic."DareasaMainVerbUse"dare"asamainverbtoexpresstheactofDaringorChallengingExample:"Shedaredhimtojumpoffthecliff."DareasaModalVerbUse"dare"asaModalVerbtoexpressaquestionaboutwhichsomeoneisbearingenoughtodosomethingExample:"Doyoudaretotryagain?"Usageoftoday03Theusageofto,could,may,andcan"to"isusedtoexpresspurposeorintentionMeanings"Iwanttogotothepark."Example"to"isalsousedininfinitiveverbs,suchas"wantto,""needto,"etcNoteUsageofto"could"isusedtoexpresslikelihoodorcapabilityinthepastorconditionMeaningsExampleNote"Hecouldhavewonifhehadtriedharder.""could"islessformalthan"may"andisoftenusedinwrittenEnglish030201Usageofcould

TheuseofmayMeanings"may"isusedtoexpresslikelihoodorpermissioninthepresentorfutureExample"Shemaycometomorrowifshehastime."Note"may"isoftenusedinformalorofficialwritingExample"IcanspeakEnglish."Note"can"iseasilyinterchangeablewith"amableto"or"isableto."ItcanalsobeusedtoexpresssurpriseoremphasisMeanings"can"isusedtoexpressabilityorpermissioninthepresentationUsageofCAN04Theusageofright,right,will,andwouldExpressionsoppositionornecessityItisusedtoexpressamoralorlogicalimprovementForexample,"Youshouldbekindtoothers."OughttoExpressionspromotionorconnectionofoppositionItisusedtoexpressthatsomethingisnotrecommendedorpermittedForexample,"Youshouldnotsmokeinpublicplaces."OughtnottoTheuseofrightRightExpressionslikelihoodorprobabilityinthepastorconditionItisusedtoexpressalesscertificateorconditionalprobabilityForexample,"Hemightbeathomenow."MighthavedoneExpressionslikelihoodorprobabilityofanactioninthepastItisusedtoexpressalesscertificateorconditionalprobabilityofanactioninthepastForexample,"Theymighthavegonetotheparkyesterday."UsageofMightVSExpressionsfutureactionoreventItisusedtoexpressapredictionaboutthefutureorthedeterminationtodosomethingForexample,"Hewillbecomeadoctorinthefuture."WillnotExpressionsnegotiationorreflectionoffutureactionItisusedtoexpressthatsomethingwillnothappenorisnotgoingtobedoneForexample,"Shewillnotgototheparty."WillUsageofwillCouldExpressionspastactionoreventItisusedtoexpressaconditioncontrasttofactorawishaboutthepastForexample,"IfIhadknowntheanswer,Iwouldhavetoldyou."WouldhavedoneExpressionspastactionoreventthatdidnothappenItisusedtoexpressaconditioncontrasttofactaboutthepastorawishthatsomethinghadbeendoneinthepastForexample,"Theywouldhavegonetothebeachifithadbeensunny."Theusageofwould05Theusageof"shall"and"can"ContractedForms:Hillisoftencontractedto'll,forexample,'Ishallgo'isoftensaidas'I'llgo'MakingPromises:Hillisusedtomakepromises,forexample,"Ishallreturntomorrow."FutureTense:Hillisusedtoexpressfuturetime,forexample,"Ishallbe20yearsoldnextyear.""Ifyouwillneedanyhelp,don'twaittoask."TheuseofshallUsageofCANAbilityorCapacityCANisusedtoexpressabilityorcapacity,forexample,"IcanspeakEnglish."PermissionorAuthorizationCANcanalsoexpresspermissionorauthorization,forexample,"CanIuseyourphone?"OpportunityorProbabilityCANcanalsobeusedtoexpressopportunityorpossibility,forexample,"Ican'tcometoday,butImightbeabletocometomorrow."FeelingorEmotionCANcanalsobeusedtoexpressfeelingoremotion,forexample,"Ican'twaittoseeyou!"06SpecialusageandprecautionsofmodalverbsItisusedtoexpressapossibilitythatismoretenseoruncert