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English TensePPT courseware•Introduction toEnglish Tense•Present tense目录•Past tenseContents•Future tense•Past future tense•The mixeduse of tensionsIntroduction toEnglish01TenseThe Conceptand Functionof TenseSummaryUnderstandingthe conceptand functionof tensesis thefoundation oflearning English grammar.Detailed descriptionTenseis aform ofEnglishgrammarused torepresent astate oftime,which helps us expressthe timewhenan actionor stateoccurs.Understanding andusing tensescorrectly canmake ourlanguageexpression moreaccurate andrich.The typesand classificationsof tensionsSummaryDetailed descriptionUnderstandingthe typesand classificationsof InEnglish,there aremainly threetenses:present,tenses helpsto betterunderstand andapply past,and future,each ofwhich hasthree forms:various tenses.general,continuous,and perfect.In addition,there aresome specialtenses,such as past futuretense,future perfect tense,etc.Understandingthese typesand classificationshelpsusbetterunderstand andapply Englishtenses.02Present tensePresentcontinuous tenseDefinition01The present continuous tense is used to expressactions orsituations that areonging atthe presentmomentFormat02The presentcontinuous tense is formed by combining thepresent tenseof theverb tobe am,is,are with the-ing formof the mainverbExamples03I amstudying,They areplaying,We areeatingPresent perfect tenseDefinition ExamplesThepresent perfect tenseis usedto expressactions or situations I have studied,They haveplayed,that have occurred upto theWe haveeatenpresent momentFormatThepresent perfecttense isformedby combiningthe presenttenseof theverb tohave withthe-ed or-en formof themainverbThe usage and precautions of the present tenseUsageThepresent tenseis used to expressactions or situationsthat are happeningnow,such asI amwriting aletter orShe isstudying EnglishPrecautionsWhen using the present tense,it isimportant tonote thatit shouldnot befusedwith thepresentcontinuous tense orthepresentperfecttenseThepresent tensedoes notexpress anyactions orrecent pastevents,but ratheractionsor situationsthat arehappening now03Past tensePastcontinuous tenseIndicatesan action that wasThe pastcontinuous tenseExample:I wasreading abook attaking place duringa certainrepresents an action that was9Oclock lastnightperiod oftime in the pasttakingplaceat a certain momentorperiod in the past,usually usedin conjunction with time adverbssuchas atthat time,at3oclock yesterday,between8and10in themorning,etc.Past perfecttenseActions completedinthe pastThe past perfecttense indicates an action thatwas completed before acertain timeinthe past,usually usedinconjunctionwithtimeadverbs suchas before,by theendof,until,etc.Example:Ihave finished myhome beforegoing tobedThe usage and precautions of the past tense•Notes onusing the past tense•When usingthe pasttense,attention should be paidto theaccuracy of the tenseto avoid confusion betweenthepresentperfecttense and the past perfecttense.At thesame time,whendescribing pastevents,one shouldfollow chronological order to avoidconfusionin time.•Example:I wentto thepark yesterdaysimple pasttense Ihave goneto thepark beforepastperfecttense04Future tenseFuturecontinuous tenseIndicatesanactionbeing takenatacertain timeThe futurecontinuous tensein English is formedinthe futureby combiningthe auxiliary verbs willor shallwiththe-ing formoftheverb It is usedtoexpress anaction thatwill beonging atsomepoint inthe futureFor example,I will bestudying Englishnext yearmeans that thestudying ofEnglish willbe ongoingduring thenextyearFuture perfectIndicatesactions that have been completed beforeacertaintime inthe futureThefuture perfecttensein Englishisformedbycombiningtheauxiliaryverbwill havewiththe past particleofthe verbIt is usedto express anactionthatwillbecompleted beforea futurepoint intime Forexample,I willhavefinished myhome bynext weekmeans thatthe homewill havebeencompletedby thefollowing weekThe usage andprecautions of future tense•Theusagescenarios andprecautions offuture tenses•Future tenseinEnglishisusedto talkabout events orsituationsthathavenot yetoccurred butwill happeninthe futureIt isimportant tonote thatthe use offuture tense dependson the context andthe informationprovidedby thespeaker Whenusing futuretense,it isessential toconsider thetime referenceand ensurethatit isclear to the listeneror readerIt is also important toavoidusing futuretense whenthe contextisalready establishedaspastor present05Past futuretensePast futurecontinuous tenseDefinitionThe past futurecontinuoustenseisusedto expressanactionthatwasonging inthe past and would continueinto the futureExampleShe saidshe wouldbe studyingfor theexam allweek.UsageThis tenseis commonlyused when referring toscheduled or planned events,aswell asactions that were inprogress inthepast and hadrelevance tothe futurePastfuture perfecttenseDefinition01Thepast future perfecttense indicatesan actionthat would havetaken placeinthepast and wouldhave beencompletedbeforeanother actionin thefutureExample02They saidthey wouldhavefinishedthe projectbythe endoftheyear.Usage03This tenseis typicallyemployed whenreferring toactionsthatwereexpected orintended tohaveoccurred inthepastandwouldhave hadrelease toafuture eventTheusageandprecautionsofthepastfuturetense要点一要点二Usage PrecautionsThepastfuturetenseisprimarily usedtoexpressWhenusingthepastfuturetense,it isimportant toactionsorsituationsthatwouldhaveoccurredor ensurethatthecontext makessense andthat thebeenongoing inthepastandwouldhave releasedto intendedmeaning isclear Avoidusing itin contextsafuture eventIt iscommonly employedin whereit couldbe fusedwith othertensions,such asconditionaloccasions andwhenreferringtothesimple pastor futureperfect tensescheduledorplannedevents06The mixeduse of tensionsTransition andalternation oftensionsTransition oftensionsWhen narratinga seriesof eventsin achronologicalorder,the use oftensions shouldflow naturallyfrom oneto another,so asstarting withthepresent simpletenseandending withthefuturesimple tenseAlternativeoftensionsIndialogues orwhen comparingpastandpresent situations,the useoftensions mayalternate betweenthepastsimple andpresent simple,depending onthecontextand emphasisdesiredThe logicalrelationship andword orderof tensionsLogicalrelationship WordorderThe choiceof tenseshould belogical Theword orderoftensionsshouldand coherent,following thenatural followstandard Englishgrammar rules,flow ofeventsoractions Forexample,if withthe mostrecent actionor eventata pastevent ismentioned first,the theend Thishelps maintainclarity andsuccessfulactions shouldgenerally beflow innarrativesin pasttense,less thereisaspecificreason touse adifferent tenseSpecialusageandprecautionsoftensionsSpecial usageThereare instanceswhere theuseoftensions isnot strictlygraphical butidiomatic,so astheuseofusedtoor wouldin certaincontexts Thesespecial usesshouldbelearned andmasteredfor fluentEnglish expressionPrecautionsWhenusing tensions,it isimportanttobe awareof contextand avoidmixing tensionsconsistentlyor inappropriatelyThis canlead tofusion orincorrect grammarItisadvisory toproofreadand reviseintentions toensure correctusage oftensions。