EnglishtenseandvoicePowerPointcoursewareOverviewofEnglishTensePresenttensePasttenseFuturetensePresentPerfectTensePastperfectcontents目錄01OverviewofEnglishTenseTensereferstothetimeandorderofaneventoractionItindicateswhichactiontoolplaceinthepast,present,orfuture,andwhichitoccursbeforeorafteranothereventEnglishtenseisdividedintothreecategories:past,present,andfutureEachofthesecategoriesisfurtherdividedintosimpleandcontinuousformsDefinitionofTenseSimplepastUsedtorefertoanactionthatoccurredinthepastandiscompletedForexample:"Iwalkedtothestoreyesterday."ContinuouspresentationUsedtorefertoanactionthatiscurrentlyongoingForexample:"Iamwalkingtothestorenow."ContinuouspastUsedtorefertoanactionthatoccurredinthepastandisongoingForexample:"Iwaswalkingtothestorewhenitstartedtorain."SimplefutureUsedtorefertoanactionoreventthatwilloccurinthefutureForexample:"Iwillwalktothestoretomorrow."SimplepresentUsedtorefertoanactionorstatethatiscurrentlytrueForexample:"Iwalktothestoreeveryday."ContinuousfutureUsedtorefertoanactionthatwillbeongoinginthefutureForexample:"Iwillbewalkingtothestorenextweek."ThetypesoftensionsTenseusageplaysacriticalroleinEnglishgrammarandpresencestructureItisusedtoconquerthetime,duration,andsequenceofeventsoractionsTenseusagevariablesdependonthecontextandgenreofwritingForexample,innarrativewriting,theuseofpasttenseismorecommon,whileindescriptivewriting,theuseofpresenttenseismorepresentTheroleandapplicationscene02PresenttenseThepresenttenseisaverbformthatexpressesactionsorstatesthatarehappeningnow,orthathashappenedintherecentpastItcanalsobeusedtoexpressgeneraltruthsorhatsDefinitionThepresenttenseofregularverbsisformedbyaddingtheending"-s"totherootformoftheverbforthethirdpersonsingular(he/she/it),or"-es"forthesecondpersonplural(you)IrregularverbshavedifferentendingsorvowelchangesCompositionThedefinitionandcompositionUsageThepresenttenseisusedtodescribeactionsthatarecurrentlyhappeningorhaverecentlyhappenedItcanalsobeusedtoexpressgeneraltruthsorhatsExampleSentence"Ieatanappleeveryday."TheUsageandExampleSentenceVSThepresenttensecanbeusedtoexpressfutureactionswhencombinedwithfuturerelatedwordssuchas"tomorrow,""nextweek,"etcThepresentperfecttense(have/has+pastparticle)isusedtocombinethepresentandpast,expressinganactionthatstartedinthepastandcontinuesintothepresentThespecialsituationofthepresenttense03PasttenseDefinitionThepasttensereferstothelanguageformusedtodescribeeventsorsituationsthatoccurredinthepast.CompositionThepasttenseisusuallyformedbythepasttenseofverbs,suchas"walked","talked",and"visited".ThedefinitionandcompositionThepasttenseisusedtodescribeeventsorsituationsthatoccurredinthepast.Yesterday,Iwalkedtothepark(Yesterday,Iwalkedtothepark.)TheusageandexamplepresenceExamplesentenceUsageSomeverbshavepasttenseformssimilartotheirpresenttense,butwithslightvariations,suchasthepasttenseofthe"be"verbbeing"was"and"were".Wewereatthemovieslastnight(Wewereinthecinemalastnight.)SpecialcaseExamplesentenceSpecialcaseofpasttense04FuturetenseDefinitionThefuturetensereferstotheactionsorsituationsthatwilltakeplaceinthefutureItisusedtoexpresspredictions,intentions,orobservationsthathaveyettooccurCompositionThefuturetenseinEnglishistypicallyformedusingtheauxiliaryverb"will"or"shall"followedbythemainverbForexample,"Iwillgo"or"Theyshalldrive."TheDefinitionandCompositionThefuturetenseisusedtoexpressfutureactions,events,orsituationsItiscommonlyusedinconditionalpresence,wheretheconditionissetinthepresentorpastbuttheresultissetinthefutureItcanalsobeusedtoexpresspolicyrequests,promises,orstatementsofintentUsage"Iwillmeetyoutomorrowatthepark."ExampleSentenceTheUsageandExampleSentenceFutureperfect:Thefutureperfecttenseisformedusing"willhave"followedbythepastparticleofthemainverbItisusedtoexpressthatanactionwillbecompletedbeforeanotheractionoccursinthefutureSpecialsituationsoffuturetExample"Iwillhavefinishedmyhomebeforetheexam."FuturecontinuousThefuturecontinuoustenseisformedusing"willbe"followedbythepresentarticleofthemainverbItisusedtoexpressanactionthatwillbeongingatafuturepointintimeExample"Theywillbestudyingbeforethenextyear."Specialsituationsoffuturet05PresentPerfectTenseDefinitionThepresentperfecttenseisaverbformthatcombinesthepresenttenseof"tohave"withapastparticleItisusedtodescribeanactionthatBeganinthepastandcontinuesintothepresentation要點一要點二CompositionThepresentperfecttenseisformedbycombiningthepresenttenseof"tohave"(have/has)withapastparticleThepastparticleisthe-edformofaverbForexample,"write"benefits"writtenThedefinitionandcompositionUsageThepresentperfecttenseisusedtodescribeanactionthatwasbeforeinthepastandcontinuesintothepresentItisalsousedtotalkaboutunfinishedorongingactionsthatstartedinthepastandcontinueduptothepresentmomentExamplesentence"Ihavefinishedmyhome."-ThismeansthatthepersoncompletedtheirhomeinthepastanditremainsfinishedatthepresentmomentTheusageandexamplepresenceThepresentperfectissometimesusedtoexpressanactionthathappenedbeforenowbutisstillrelevantorsignificantinthepresentcontextForexample,"Ihaveseenthatmoviebefore."-Thismeansthatthepersonwatchedthemovieinthepastbutitissti