英语人教版八年级下册unit10.ppt

,学练优八年级英语下（RJ）教学课件,SectionA(3a-4c),Unit10Ivehadthisbikeforthreeyears.,Leadin,Reviewtheconversationtheylearnedinlastclass.,Howlonghaveyouhadthatbikeoverthere?,A:Doyouhavea(n)_?B:Yes,Ido.A:Howlonghaveyouhadit?B:Ivehaditfor/since,Pairwork,3bReadthearticleagainandanswerthequestions.,1.Whydidtheydecidetohaveayardsale?2.Whatdotheywanttodowiththemoneyfromthesale?3.Whydoesthesonwanttokeepthetrainandrailwayset?4.Howcantheoldtoysbeusefulagain?5.Haveyoueverthoughtaboutayardsaletosellyourthings?,探究点一Reading,3cFindthewordsorphrasesinthearticlewhichcanbereplacedwiththeonesbelowandwritedownthemnexttothewords.,Summary,现在完成时用法（二）,此用法需注意两点：,1）常与for,since引导的时间段的时间状语连用。,2）动词使用延续性动词。,since,for的用法:,since:自.以来1)since+时间点Hehasstayedheresince5oclock.2)since+时间段+agoHehasstayedheresince5hoursago.3)since+从句(句子要用一般过去时态）ShehastaughtEnglishsincehecamehere.for:(长达）for+时间段Hehaskeptthebookfor2weeks.,since一段时间agofor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。,Itis+时间段+since+一般过去时的句子.,1.他的爷爷已经去世2年了。2.Nick参军三年了。3.他离开深圳好长时间了。4.这本书我已借了4个月了。,Itis2yearssincehisgrandpadied.,Itis3yearssinceNickjoinedthearmy.,ItisalongtimesinceheleftShenzhen.,Itis4monthssinceIborrowedthebook.,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,常见非延续性动词和延续性动词的转变,第一类：短暂动词be+adj.diefinishopen/closefallill/asleepmarrysb/getmarriedto第二类：短暂动词be+介词.start/beginleavejoin,bedead,beawayfrom,bein/beamemberof,beopen/closed,beon,beover,beill/asleep,bemarriedto,第三类：短暂动词另一个动词buyborrowbecomeputon,keep,have,be,wear,巧记瞬间性动词的转换：开始离去借来还，出生入死买到家，穿衣入睡要感冒，开开关关变结束。,4a,Rewritethesentencesusingfororsince.,JimisinJapan.Hearrivedtherethreedaysago.2.Theyareveryhungry.Theirlastmealwastenhoursago.,Theyhaventeatenfortenhours/sincetenhoursago.,JimhasbeeninJapanforthreeyears.,Quiz,3.Ihaveacamera.Iboughtitin2009.4.IknowAnna.Ifirstmetherthreeyearsago.5.Lindaisill.ShebecameillonMonday.,Ihavehadacamerasince2009.,IhaveknownAnnforthreeyears/sincethreeyearsago.,LindahasbeenillsinceMonday.,4b,Fillintheblankswiththecorrectformsoftheverbsinbrackets.,I_(neverbe)tothewaterparkbefore.Iwantto_(go)nextmonthbeforetheweathergetstoocold.2.They_(neverown)anypets,butthey_(alwayswant)tohaveadog.,haveneverbeen,go,haveneverowned,havealwayswanted,3.We_(have)apianosincelastNovember.We_(buy)itfromtheLifamilywhentheymovedtotheUSlastyear.4.CathyandAmy_(notbe)backtotheirhometownfortwoyears.They_(miss)theirhometownalotandhopetovisittheplacenextyear.,havehad,bought,haventbeen,miss,5.Thismuseum_(be)hereforover20years.It_(be)oneoftheoldestbuildingsinthissmalltown.,hasbeen,is,Fillinthequestionsandasktwostudents.Thencompletethechart.,1.Doyouhavea(an)_?Howl