Unit10 SectionA Grammar focus课件（人教八下Unit 10 I’ve had this bike for three years）.pptx

ThePresentPerfectTense现在完成时Unit10Grammar

Changsha

XiangjiangRiverOrangeIsle(小岛)PlacesofinterestKaifuTempleTongguanKiln(窑)MeixiLakeYueluMountainRiversideCulturalParkZhongshanPavilionAiwanPavilion

-Haveyoueverbeento...?-Yes,Ihave(beento...)./No,Ihavent./Ihaveneverbeento...XiangjiangRiverOrangeIsleKaifuTempleTongguanKilnMeixiLakeYueluMountainRiversideCulturalParkAiwanPavilionIhave/haventbeento...XiangjiangRiver

TastyCray/CrawfishStinkyTofuSexyTeaTaiGaiTastySnakeCocoIhavealreadyeaten/drunk...DeliciousfoodanddrinksIhaventtried...yet.FriedPorkwithPeppers

IvebeentotheStrawberryMusicFestival.

IboughtaStrawberryPackagewhenIwenttherelastyear.YouhavehadthePackagefor_____________.ayearYouhavehadthePackagesince____________.ayearago/since__________.lastyear/since___________________________.youwenttothemusicfestivalHowlonghaveIhadthepackage?for+一段时间since+过去的时间/since+从句（过去时）

Findoutthepresentperfecttenseandsummarizetherulesaccordingtowhatyouhaveknown.summary1.构成及用法现在完成时由“___________+__________”构成，表示_______发生的某一动作对_______造成的影响或结果，也可以表示_______已经开始，持续到_______的动作或状态，常与表示延续的时间状语连用，如______+一段时间，______+过去的时间在肯定句中，表示持续动作或状态的动词多是_________动词。have/hasdone过去动词的过去分词现在过去现在forsince延续性

since,for的用法:since:自…...以来1)since+时间点He?has?stayed?here?since?5?o’clock.2)since+时间段+agoHe?has?stayed?here?since?5?hours?ago.3)since+从句(句子要用一般过去时态）She?has?taught?English?since?he?came?here.for:(长达）for+时间段Hehaskeptthebookfor2weeks.

since＋一段时间＋ago＝for＋时间段;sincetwoweeksago=fortwoweeks;Ihavekeptthelibrarybookforaweek.=Ihavekeptthelibrarybooksinceaweekago.在现在完成时态中，for与since引导的时间状语可以相互转换。

常见非延续性动词和延续性动词的转变第一类：非延续性动词be+adj.diefinishopen/closefallill/asleepmarrysb/getmarriedto第二类：非延续性动词be+介词start/beginleavejoinbedeadbeawayfrombein/beamemb