英语人教版八年级下册10单元.pptx

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1、I'vehadthisbikeforthreeyears.Unit10Period3SectionA(4a-4c)表示从过去已经开始持续到现在的动作或状态，可以和表示“从过去某一时刻延续到现在的一段时间状语”连用，如“for+时间段”、“since+过去时间点”、“since+过去时的从句”、“since+一段时间+ago”。且for与since引导的时间状语可以相互转换。PresentPerfectTense现在完成时e.g.Myunclehasworkedatthisfactoryfortenyears.=Myuncleha

2、sworkedatthisfactorysincetenyearago.I’ve lived heresince1990．自从1990年以来我就住在这里。I haven’t seen himforthree years.我三年没有看见他了。含有for，since的现在完成时的用法歌诀:过去的动作或状态，一直持续到现在，for、since把时间带。歌诀She’s been at this schoolsincefive years ago.自从五年前以来她就在这个学校。此种用法中表示持续性的动作或状态的动词必须是延续性动词(否定句

3、除外)。1.这本书我买了5年了。Ihaveboughtthebookforfiveyears.()I’vehadthebookforfiveyears.()×√句中动词的特点2.你哥哥参军多长时间了？Howlonghasyourbrotherjoinedthearmy?()Howlonghasyourbrotherbeeninthearmy/beenasoldier?()×√1.转换为相应的延续性动词，用于现在完成时。borrow—keepbuy—haveputon—wearcatchacold—haveacoldgettokn

4、ow—knowgettosleep—sleep非延续性动词和延续性动词之间的转换finish—beoverfallsleep—beasleepjoin—bein/beamemberofbecome—bemakefriends—befriendscome/go/—be+相应的介词短语1.She_______thisbookfornearlythreeweeks.A.hasborrowedB.haslentC.hasboughtD.haskept2.Tenyearshaspassed____theCCTVeventPeopleWho

5、MovedChinatookplacein2002.A.whenB.whileC.beforeD.since√√Exercises4aRewritethesentencesusingfororsince.JimisinJapan.Hearrivedtherethreedaysago.2.Theyareveryhungry.Theirlastmealwastenhoursago.Theyhavebeenhungryfortenhours/sincetenhoursago.上述表达不符合逻辑，正确表达应为：Theyhavenotea

6、tenfortenhours/sincetenhoursago.JimhasbeeninJapanforthreeyears.3.Ihaveacamera.Iboughtitin2009.4.IknowAnna.Ifirstmetherthreeyearsago.5.Lindaisill.ShebecameillonMonday.Ihavehadacamerasince2009.IhaveknownAnnforthreeyears/sincethreeyearsago.LindahasbeenillsinceMonday.4bF

7、illintheblankswiththecorrectformsoftheverbsinbrackets.I_______________(neverbe)tothewaterparkbefore.Iwantto_____(go)nextmonthbeforetheweathergetstoocold.2.They_________________(neverown)anypets,butthey___________(alwayswant)tohaveadog.haveneverbeengohaveneverownedhav

8、ealwayswanted3.We_________(have)apianosincelastNovember.We_______(buy)itfromtheLifamilywhentheymovedtotheUSlastyear.4.CathyandAmy__