2023学年完整公开课版【语法】介词forsince

介词for,sinceLead-in

since与for共同点：都用于现在完成时态中；区别：1.since：自从……起；

for:（持续了多长时间）

2.后面所跟的时间不同

Presentation

区分：时间点和时间段

5:305years3minutes2002May5th2months时间点：

时间段：

5:302002May5th5years3minutes2monthsPresentationsince与for都用于现在完成时态中，since后面加时间点；for后面加时间段；如：since1989/twoyearsago；for20years；for后面不能加ago；

since用来说明动作起始时间，for用来说明动作延续时间长度。Presentation例如：Hehasbeendeadforthreeyears.

时间段

Hehasbeendeadsincethreeyearsago.

时间点

HehasstudiedEnglishsince2003.

时间点HehasstudiedEnglishsincehewastenyearsago.

时间点（句子）Presentationfor+时间段，表示持续了多久。Ihavebeenateacherfor10yeras.

时间段since+过去的某个时间点，表示自从……时候起。Ihavebeenateachersince2010.

时间点IhavebeenateachersinceheleftZhuzhou.

时间点（句子）PresentationFindoutthesentencesaboutforandsinceonPage16.1.Shehasbeenateachersince1997.since+

时间点2.Shehasbeenateacherforquiteafewyears.for+时间段3.Hehasbeenapolicemanfortwelveyears.for+时间段Presentation4.Shehasbeenanarchitectfortenyears.for+时间段5.Myfatherhasbeenanengineersince2004.since+时间点6.Hehasbeenanengineerforseveralyears.

for+时间段Presentation选用for、since填空1.Wehaven'tseeneachother______alongtime.2.Hisfatherhasbeeninthisfactory______10yearsago.3.Thefilmhasbeenon_____10minutes.4.Mr.Smithhasworkedhere________hecametoChina.5.Hisgrandpahasbeendead______severalyears.forsinceforsinceforPresentationThinkitover!Aretheyright?我买这本书3年了。Ihaveboughtthebookforthreeyears.Mary的爷爷从2010年去世至今。Mary'sgrandpahasdiedsince2010.Why?××How?Presentation区分瞬间动词和延续性动词瞬间动词：发生的时间短暂，不能和延续性的时间词语连用。如：buy,close等。延续性动词：动作可以延续，或者就是一个状态。如：be,keep,stay等。Presentation瞬间动词与延续性动词的转换：come/goIhavebeeninZhuzhoufor5years.buy--Ihavehadthebookfortwoweeks.borrow--Ihavekeptthebookfor3days.--be(in/at)havekeepPresentationdie--Hehasbeendeadfor1year.become--Ihavebeenateacherfor10years.marry--Theyhavebeenmarriedfor15years.open--Thedoorhasbeenopenfor3hours.bedead

bebemarriedbeopenPresentation如：1.我买这本书3年了。Ihavehadthebookforthreeyears.2.Mary的爷爷从2010年去世至今。Mary'sgrandpahasbeendeadsince2010.3.我借这本书一周了。

Ihavekeptthisbookforaweek.4.这个商店已经关门2天了。

Thisshophasbeenclosedfortwodays.Presentation

随堂练习1.

我借他的书有2个月了。I_________hisbook_____twomonths.I___________hisbook_______twomonthsago.2.自从10年前，

Tom已经来了株洲。

Tom____________Zhuzhou______tenyearsago.havehadforhavehadsincehasbeeninsincePresentation3.他买这本书1年了。

He_________thebook______1year.4.从2010年起，他已经是个有名的歌手了。

He___________afamoussinger______2010.5.他的爷爷已经去世3年了。

Hisgrandpa__________________threeyears.Hisgrandpa_________________threeyearsago.haskeptforhasbeensincehasbeendeadforhasbeendeadsincePractice

直击中考【2014.宜宾】Bobwithhisparents___Hongkongsincetwoyearsago.A.havebeentoB.hasbeentoC.havegonetoD.hasgoneto解析：题干意为：鲍勃与他的父母两年前去了香港。根据句意，“去了”应用havebeento，故答案为A.APractice【2013.泸州】He____Luzhouforthre