初中英语人教版八年级下册Unit 10 Grammar focus

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1、Unit10SectionA3(Grammarfocus–4c)学习目标：★知识目标掌握现在完成时的用法★能力目标正确使用现在完成时正确运用for和since的用法★学习过程Step1Revision1.复习现在完成时的概念，用法，结构2．区分havebeento,havegoneto,havebeenin的用法Step2精讲点拨现在完成时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”、

2、“since+一段时间+ago”。且for与since引导的时间状语可以相互转换。e.g.Myunclehasworkedatthisfactoryfortenyears.=Myunclehasworkedatthisfactorysincetenyearago.I’ve lived here since 1990．I haven’t seen him for three years.She’s been at this school since five years ago.  句中动词的特点此种用法中表示持续性的

3、动作或状态的动词必须是延续性动词（否定句除外）1.这本书我买了5年了。Ihaveboughtthebookforfiveyears.()I’vehadthebookforfiveyears.()2.你哥哥参军多长时间了？Howlonghasyourbrotherjoinedthearmy?()Howlonghasyourbrotherbeeninthearmy/beenasoldier?()非延续性动词和延续性动词之间的转换1.转换为相应的延续性动词，用于现在完成时。borrow—keepbuy—haveputon—

4、wearcatchacold—haveacoldgettoknow—knowgettosleep—sleep2.转化为“be+形容词/副词/介词/名词”begin/start—beongoout—beoutclose—beclosedopen—beopengetto/arrive/reach—be(in)die—bedeadleave—beawayfinish—beoverfallsleep—beasleepjoin—bein/beamemberofbecome—bemakefriends—befriendscome

5、/go—be+相应的介词短语Step3微课视频学习复习Step4Workon4aRewritethesentencesusingfororsince1.JimisinJapan.Hearrivedtherethreeyearsago.JimhasbeeninJapanforthreeyears.2.Theyareveryhungry.Theirlastmealwastenhoursago.Theyhavebeenhungryfortenhours/sincetenhoursago.3.Ihaveacamera.Ibo

6、ughtitin2009.Ihavehadacamerasince2009.4.IknowAnn.Ifirstmetherthreeyearsago.IhaveknownAnnforthreeyears/sincethreeyearsago.5.Lindaisill.ShebecameillonMonday.LindahasbeenillsinceMonday.Step5Workon4bFillintheblankswithcorrectformsoftheverbsinbrackets.1.I__________(

7、neverbe)tothewaterparkbefore.Iwantto_____(go)nextmonthbeforetheweathergetstoocold.2.They_____________(neverown)anypets,butthey___________(alwayswant)tohaveadog.3.We________(have)apianosincelastNovember.We______(buy)itfromtheLifamilywhentheymovedtotheUSlastyear.

8、4.CathyandAmy__________(notbe)backtotheirhometownfortwoyears.They_______(miss)theirhometownalotandhopetovisittheplacenextyear.5.Thismuseum__________(be)hereforover20years.It