1.一般现在时thesimｐｌｅｐresentteｎseInＥngｌｉshgramｍaｒ,thｅｓimｐlepresｅnttｅnseｉsaｆoｒｍｏｆｔｈｅｖｅrbthatrefersｔoanａctionoｒｅｖentthatiｓonｇoingorthatrｅgｕlarlytakｅsｐlａｃｅinpresｅnｔtiｍｅ.InEnglishgrammar,tｈereaｒesevｅnａcｃeｐtedｆuncｔionsofthｅusageoftｈesｉmplｅｐｒeseｎtｆorｏfverbs:ｔoｅxpreｓspeｒmanentstates,gｅｎerａltruths,habiｔｕalactiｏns,liｖecommenｔary,ｐerformatiｖeaｃtions,pａsttｉmeorhｉstoricpｒesent,andfｕturetimｅ.1)Peｒmaneｎtstate:Juｐiteｒisaveｒｙｍassｉvｅpｌaneｔ.2）Geｎｅrａlｔruｔh:Theearthｉsrｏund.ﻫ3)Ｈaｂiｔuaｌａctｉon:HerｄaughteｒｗｏrksｉnRoｍｅ．4)'Ｌｉvｅ＇cｏmmｅntａrｙ:InｅachcaseIaddtｈetwonumbeｒs:tｈreepluｓthｒeｅgivessｉx．．..ﻫ5）Ｐｅrｆormativｅ:Ipronouｎcｅｙoumaｎａnｄwife．6)Ｐasttiｍe（seehisｔoricpreseｎｔ）:Ｈemovestothewindowaｌｏngsidｅ,andseｅshｅrinsideｔheofficemｏvingawayfroｍtｈeｄoor.Heshootｓtwiｃetｈroughthewｉndowａｎdｋillsher.ﻫ7)Futurｅtiｍe：Myflighｔleaｖesatfoｕrthｉrtythisａfteｒnoon."２.一般过去时tｈｅsｉｍplepasｔtenseIｎEnglishgrammar,thesimｐlepastｉsavｅrbtense(thesｅｃｏndprinciｐalpaｒｔofavｅrｂ)inｄiｃaｔiｎｇactiontｈatoccurredｉnthepａstaｎdｗhｉchdoeｓnotextendｉntｏthepresent.Thｅsimpｌepasttense（alｓoknoｗnastｈepａstsimｐlｅorpreteritｅ）ofregularverbsismａｒkedｂyｔｈeendinｇ-d,-ed，oｒ-t.Iｒｒeguｌarveｒbshavｅavaｒietyofｅndｉngs.Ｔｈesimpｌepaｓtisnｏtaccompanｉedbyhｅlpｉngverｂs.3.一般将来时thｅｓimｐlefuturetensｅIｎＥnglisｈｇrammaｒ，theｆｕtureiｓａｖｅrｂｔenｓe(oｒｆorm--seｅthenotesｂyPinkeraｎdRｉssaneｎbelow）iｎｄｉcａtinｇaｃtｉonｔhaｔhaｓnotyetbｅgun.Thereisnｏsepaｒａteｉnfｌecｔｉoｎ(oｒｅnｄinｇ)fortheｆutureiｎEnｇlisｈ.Thesimｐlｅfｕtｕreisusｕallyexpressｅdｂyｐｌａciｎgtheａuxiｌｉaｒywiｌloｒｓhａlｌinfｒｏnｔｏｆthebaｓｅfoｒmofaveｒｂ（"Ｉwillleaｖeｔonight").Oｔheｒｗaｙsｔoexpressｔhefutureｉncｌudｅ(ｂuｔaｒenｏtｌｉmｉtｅdtｏ）theuｓｅｏf:1.aｐreｓeｎtformofbeplｕsgｏingto:"Wearegoｉｎgtｏlｅave."2.tｈepreseｎｔprogressive:"Tｈeｙａreleａvｉnｇtomoｒrｏw."3.thesiｍpleｐresent:"TｈechildrenｌeavｅonWedｎｅsｄaｙ."４.现在进行时5.过去进行时6将来进行时Tｈefuｔｕrecontinｕoｕstenｓeisuｓｅｄtｏｅxpｒｅｓsaｃｔionaｔapａrticularmoｍｅntintheｆｕture．Hoｗｅｖeｒ，theactionwiｌlnｏthavefinｉsheｄaｔthemoment．７．现在完成时ｐresentperfecttｅnｓeＴhepｒeｓentｐｅrfecｔtense(sometｉmeｓｒｅferｒeｄｔoasthepresentpeｒｆectsimpleteｎｓe)iｓformedbyusiｎgtｈepresenｔteｎｓｅoftｈeaｕxiｌiａryvｅｒb“haｖe”（ｏr“ｈas,”ifusedwithｔhｉｒd-peｒｓonsinｇｕlaｒｐronouns)alｏngwitｈthｅpａstparｔiｃiｐleofthe“main”veｒｂ．Deｓpiteitsname,thｅpresentpeｒfｅctisｕｓeｄtｏgivegｅnｅrａlinformatｉｏnaboｕｔｓomethiｎｇthathappｅｎｅdiｎthｅpａst(anytimｅ“ｂｅforenｏw”),ｂuｔｗhiｃhdidnｏｔｏccuratadefｉnitivepｏintiｎtime,andｉｔiｎflｕencesnｏworcｏntinuesintｈｅpｒesenｔ．．Theｅxａｃｔｔimeisｎｏtimporｔaｎt.ＹｏｕCANＮOTuseｔhｅPreseｎtPｅrｆectwitｈspｅcifｉctimeexpreｓsiｏnｓsuｃhａｓ:yestｅrday，oneyeａraｇo,ｌaｓｔｗeek,ｗhenIｗａｓaｃhｉｌd,whenＩliｖｅdｉnJapan,ａtｔｈatmomｅnt,ｔｈatday,oｎｅdaｙ，ｅtc.WeＣANusｅtｈeＰrｅsentPerｆecｔwｉｔhuｎsｐeｃifｉcexpｒessionssuchas：ｅver,nｅveｒ，ｏnｃｅ，mａnｙtimｅs,severaltimeｓ,before,sｏｆar，alｒeadｙ,yeｔ，etｃ.Ｅｘamｐles:Iｈaveseｅｎthatｍovietｗｅntytimes.ＩthｉnkＩhaveｍｅｔhimo...
