Unit10SectionA(4a4c)课件人教版八年级英语下册

Unit10I'vehadthisbikeforthreeyears.SectionA(4a-4c)Bytheendofthisperiod,youwillbeableto1.learnknowledgeaboutpresentperfecttensewithsinceandfor;2.writecorrectsentenceswithpresentperfecttense;3.writeaboutyourfavoritething；4.improveyourwritingbyusingdifferentwordsandphraseswithsimilarmeaningandaddmorerelatedinformation.HowlonghaveyouhadthatbikeoverthereI’vehaditforthreeyears.RoleplayHowlonghashissonownedthetrainandrailwaysetHe’sowneditsincehisfourthbirthday.Howlonghaveyouhadthatbikeoverthere?I’vehaditforthreeyears.Howlonghashisson

ownedthetrainandrailwayset?He’sowneditsincehisfourthbirthday.Haveyoueverplayedfootball?Yes,IdidwhenIwaslittle,butIhaven’tplayedforawhilenow.GrammarFocusPresentPerfectTense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”、“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.Myunclehasworkedatthisfactoryfor

tenyears.=Myunclehasworkedatthisfactory

sincetenyearago.I’ve

lived

here

since

1990．

自从1990年以来我就住在这里。

I

haven’t

seen

him

for

three

years.

我三年没有看见他了。

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.HehasstudiedEnglishforfiveyears.

他学英语5年了。（2）since后须接“时间点”e.g.HehasstudiedEnglishsince1999.

他从1999年开始学英语。for和since在现在完成时中的应用for+一段时间（fortwoweeks）since+

过去的时间点（since8:00）since＋一段时间＋ago(sincetwoweeksago)since+从句(一般过去时)用for和since填空:1.Wehaven’tseeneachother______alongtime.2.Hisfatherhasbeeninthefactory______10yearsago.3.Thefilmhasbeenon______20minutes.4.MrGreenhasworkedhere______hecametoChina.5.Hisgrandparentshavebeendead______severalyears.6.Itisfiveyears_______wemetlasttime。forsinceforsinceforsince【例1】他去世三年了。误：Hehasdiedforthreeyears.正：Hehasbeendeadforthreeyears/sincethreeyearsago.正：Hediedthreeyearsago.【例2】我到这儿3天了。误：Ihavearrivedherefor3days.正：Ihavebeenherefor3days.1.JimisinJapan.Hearrivedtherethreedaysago.2.Theyareveryhungry.Theirlastmealwastenhoursago.3.Ihaveacamera.Iboughtitin2009.4aRewritethesentencesusingfor

orsince.JimhasbeeninJapanforthreedays.P76Theyhavenoteatenfortenhours.Ihavehadacamerasince2009.4.IknowAnna.Ifirstmetherthreeyearsago.5.Lindaisill.ShebecameillonMonday.IhaveknownAnnaforthreeyears.LindahasbeenillsinceMonday.P761.I__________________(neverbe)tothewater

parkbefore.Iwantto____(go)nextmonthbeforetheweathergetstoocold.2.They_____________________

(neverown)anypets,butthey______________________(alwayswant)tohaveadog.3.We__________(have)apianosincelastFillintheblankswiththecorrectformsoftheverbsinbrackets.haveneverbeengohaveneverownedhavealwayswantedhavehad4b

November.We_________(buy)itfromtheLi

familywhentheymovedtotheUSlastyear.4.CathyandAmy_____________(notbe)backtotheirhometownfortwoyears.They______(miss)theirhometownalotandhopetovisittheplacenextyear.5.Thismuseum__________(be)hereforover20years.It_____(be)oneoftheoldestbuildingsinthissmalltown.boughthaven’tbeenmisshasbeenisFillinthequestionsandasktwostudents.Thencompletethechart.1.Doyouhavea(n)_________Howlonghaveyouhadit2.Doyouowna(n)__________HowlonghaveyouowneditThingsHowlongTonyfavoritebookfortwoyearsbasketballsincehewas10yearsoldstudent1student24csummary现在完成时1.构成2.用法3.常用时间状语（标志词）4.和一般过去时的区别5.一区别6.瞬间动词和延续性动词的转换ExercisesI(see)himjustnow.2.I(notsee)himforalongtime.3.He(live)heresincehewastenyearsold.4.He(live)herein1998.5.---youyourbreakfast---Yes,Ihave.---Whenyouit---Thirtyminutesago.(eat)sawhaven’tseenhaslivedlivedHaveeatendideat6.—DoyouknowthemovieLostinThailand—Yes.I______ittwice.It’sfunny.A.sawB.seeC.haveseenD.willsee7.—Lunch—No,thanks.I__________.A.willeatB.ameatingC.haveeaten8.—WhereisTomWecan’tfindhimanywhere.—Perhapshe_____home.A.hasgoneB.isgoingC.wentD.wasgoing9.Sanyaisabeautifulcity.I

theretwice.