Unit10Section A Grammar Focus-4c 课件-人教版八年级英语下册.pptx

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1、Unit 10Ive had this bike for three years.LeadLead inin多长时间多长时间三年三年轨道火车轨道火车四岁生日四岁生日一段时间一段时间三天以前三天以前十小时以前十小时以前howlongthreeyearstrainandrailwaysetfourthbirthdayawhilethreedaysagotenhoursagoLeadLead inin下个月下个月去年去年11月月去年去年返回返回家乡家乡希望做某事希望做某事明年明年最古老的建筑之一最古老的建筑之一nextmonthlastNovemberlastyearbebacktohometown

2、hopetodosth.nextyearoneoftheoldestbuildingsMaster the new words and phrases.Do some exercises to consolidate the target language.The usages of for and since in present prefect tense.1.Lookatthesentencesintheblanks，readthem(3)2.Haveacheck.(2)Self-learning Howlonghaveyouhadthatbikeoverthere?Ivehaditfo

3、rthreeyears.Howlonghashissonownedthetrainandrailwayset?Hesowneditsincehisfourthbirthday.Haveyoueverplayedfootball?Yes,IdidwhenIwaslittle,butIhaventplayedforawhilenow.GrammarFocus表示从过去已经开始持续到现在的动作或状表示从过去已经开始持续到现在的动作或状态，可以和表示态，可以和表示“从过去某一时刻延续到现在从过去某一时刻延续到现在的一段时间状语的一段时间状语”连用，如连用，如“for+时间段时间段”、“since+过去

4、时间点过去时间点”、“since+过去时的从句过去时的从句”、“since+一段时间一段时间+ago”。且。且for与与since引导的时引导的时间状语可以相互转换。间状语可以相互转换。Exploratione.g.Myunclehasworkedatthisfactoryfortenyears.=Myunclehasworkedatthisfactorysincetenyearago.Ivelivedheresince1990自从自从1990年以来我就住在这里。年以来我就住在这里。Ihaventseenhimforthreeyears.我三年没有看见他了。我三年没有看见他了。含有含有for，

5、since的现在完成时的用法歌诀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，过去的动作或状态，一直持续到现在，for、since把时间带。把时间带。Shesbeenatthisschoolsincefiveyearsago.自从五年前她就在这个学校。自从五年前她就在这个学校。for与since都能与现在完成时连用，但区别较大：（1）for后须接“时间段”e.g.He has studied English for five years.他学英语5年了。（2）since后须接“时间点”e.g.He has studied English since 1999.他从1999年开始学英

6、语。（3）二者可以转换二者可以转换for+一段时间一段时间=since+一段时间一段时间+agoe.g.Hehasbeenhereforfiveweeks.=Hehasbeenheresincefiveweeksago.他到这儿已经有五个星期了。他到这儿已经有五个星期了。e.g.HehastaughtheresincehecametoChina.自从他来到中国就在这儿教书。自从他来到中国就在这儿教书。Wehavebeenfriendssincewemetinschool.我们从在学校见面起就成为了好朋友。我们从在学校见面起就成为了好朋友。（4）since能引导时间状语从句能引导时间状语从句(主

7、句用现在完成时，从主句用现在完成时，从句用一般过去时句用一般过去时)，而，而for则不能。则不能。（6）均须与延续性动词连用，也可以与非延续性动词的否定式连用。e.g.I have had this computer since four years ago.I havent bought anything for two months.I havent heard from him for 3 weeks.非延续性非延续性动词用于完成时态，在肯定句中不能与动词用于完成时态，在肯定句中不能与for或或since引出的短语引出的短语(或句子或句子)连用，但在否定句中是可以的，连用，但在否定句中是

8、可以的，因为一个因为一个非延续性动词非延续性动词一旦被否定即成为状态，而状态总一旦被否定即成为状态，而状态总是可以延续的。如：是可以延续的。如：Ihaventseenhimforalongtime.我很久没见到他了。我很久没见到他了。Hehasntcomehereforsometime.他有段时间没来了。他有段时间没来了。Ihaventheardfromhersincesheleft.自她离开以后，我一直没收到她的来信。自她离开以后，我一直没收到她的来信。（7）二者引出的时间状语往往用二者引出的时间状语往往用howlong提问。提问。e.g.How long have you had this

9、 book?For a week./Since a week ago.这本书你买多久了?买一周了。常见非延续性动词和延续性动词的转变常见非延续性动词和延续性动词的转变第一类第一类：短暂性动词：短暂性动词be+adj.diefinishopen/closefallill/asleepmarrysb/getmarriedto第二类第二类：短暂性动词：短暂性动词be+介词介词start/beginleavejoinbedeadbeawayfrombein/beamemberofbeopen/closedbeonbeoverbeill/asleepbemarriedto第三类第三类：短暂性动词：短暂性

10、动词另一个动词另一个动词buyborrowbecomeputonkeephavebewear巧记瞬间性动词的转换：巧记瞬间性动词的转换：开始开始离去借来还离去借来还，出生出生入入死死买买到到家家，穿衣穿衣入睡入睡要要感冒感冒，开开开开关关关关变变结束结束。1beginbeon6returnbeback2leavebeawayfrom7joinbein3gobeoff8diebedead4borrowkeep9buyhave5comebehere10arrivebehere10reachbehere11putonwear12fallasleepbeasleep13catchacold havea

11、cold14openbeopen15closebeclosed16becomebe17end/finishbeover一、一、选择选择for或或since填空：填空：1.Ihavebeenhere_fivemonthsago.2.Hehasbeenasoldier_abouttwomonths.3.Greatchangeshavetakenplace_youleft.4.Hisgrandpahasbeendead_tenyears.5.IhavestudiedEnglish_Iwas12yearsold.6.Itistwoyears_Ibecameapostgraduatestudent.si

12、nceforsinceforsincesince4aRewritethesentencesusingfororsince.1.JimisinJapan.Hearrivedtherethreedaysago.2.Theyareveryhungry.Theirlastmealwastenhoursago.3.Ihaveacamera.Iboughtitin2009.JimhasbeeninJapanforthreedays.Theyhavenoteatenfortenhours.Ihavehadacamerasince2009.4.IknowAnn.Ifirstmetherthreeyearsag

13、o.5.Lindaisill.ShebecameillonMonday.IhaveknownAnnaforthreeyears.LindahasbeenillsinceMonday.4bFillintheblankswiththecorrectformsoftheverbsinbrackets.1.I_(neverbe)tothewaterparkbefore.Iwantto_(go)nextmonthbeforetheweathergetstoocold.2.They_(neverown)anypets,butthey_(alwayswant)tohaveadog.haveneverbeen

14、gohaveneverownedhavealwayswanted3.We_(have)apianosincelastNovember.We_(buy)itfromtheLifamilywhentheymovedtotheUSlastyear.4.CathyandAmy_(notbe)backtotheirhometownfortwoyears.They_(miss)theirhometownalotandhopetovisittheplacenextyear.havehadhavenotbeen/haventbeenboughtmiss5.Thismuseum_(be)hereforover2

15、0years.It_(be)oneoftheoldestbuildingsinthissmalltown.hasbeenis4cFillinthequestionsandasktwostudents.Thencompletethechart.1.Doyouhavea(n)_?Howlonghaveyouhadit?2.Doyouowna(n)_?Howlonghaveyouownedit?ThingsHowlongTonyfavoritebook fortwoyearsbasketballsincehewas10yearsoldstudent1student2SummaryTell the d

16、ifferences between for and since.Master the Continuous verbs and noncontinuous verbs练习题:1.Itsalongtimesincewe_(meet)last,isntit?2.-Iknowyou_(choose)apicturebookamongthese.-Yes,Havealookatit,please.3.Sofar,spaceshipswithoutpeople_(reach)themoonandsomeotherpartsoftheuniverse.4.Myfather_homefornearlythreeweeks.A.hasgoneawayfromB.hasleftC.hasbeenawayfromD.wentaway5.Mr.andMrs.Greenhave_inChinaforaweek.A.beenB.gotC.arrivedD.reachedmethavechosenhavereachedCA1.ReviewGrammar.2.Finishtheexercisesintheworkbook.