初中英语语法复习-现在完成时课件.pptx
MiddleSchoolEnglishGrammarReview-PresentPer
目录ThedefinitionandstructureofthepresentperfecttenseThebasicusageofthepresentperfecttenseSpecialusageofpresentperfecttenseCONTENTS
目录ThedifferencebetweenpresentperfecttenseandsimplepasttensePracticeandconsolidationofthepresentperfecttenseCONTENTS
01ThedefinitionandstructureofthepresentperfecttenseCHAPTER
Thepresentperfecttenseisagrammaticalstructurethatcombinesthepastsimpletensewiththepresentparticipletoexpressanactionthathasbeencompletedatsomepointinthepastanditsrelevancetothepresentmoment.Thistenseisusedtocommunicateactionsorsituationsthatbeganinthepast,continueduptothepresent,andmayormaynotcontinueintothefuture.Itemphasizestheconnectionbetweenthepastandthepresent,oftenfocusingontheresultorimpactofthepastactiononthepresentstateofaffairs.definition
Thestructureofthepresentperfecttenseconsistsofhave/hasfollowedbythepastparticipleoftheverb.Theauxiliaryhave/hasiscombinedwiththepastparticipleoftheverb,whichisformedbyadding-edtothebasicformoftheverb(e.g.,writebecomeswritten).Thesubjectandauxiliaryarethencombinedtocreatethecompletepresentperfecttensestructure,suchasShehaswrittenaletterorTheyhavefinishedtheirhomework.structure
02ThebasicusageofthepresentperfecttenseCHAPTER
Thepresentperfecttenseisusedtoshowhowpastactionshaveaffectedthepresentsituation.Forexample,IhavestudiedEnglishfor3years,soIhaveagoodgraspofthelanguage.Itcanalsobeusedtoexpressanactionthatstartedinthepastandcontinuesintothepresent,suchasShehasbeenlivinginNewYorkforthepast5years.Theimpactofpastactionsonthepresent
Thepresentperfecttenseisusedtodescribeactionsthatstartedinthepastbutarestillongoinginthepresent.Forinstance,Hehasbeenworkingasateach