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1、Unit10I’vehadthisbikeforthreeyears.GrammarPresentperfecttensewithsinceandforGrammarLesson:forandsince现在完成时表示动作或状态在过去已经开始，持续到现在可能还要持续下去，常和for,since引导的表示一段时间的时间状语连用，谓语动词多用延续性动词。如：live,teach,learn,work,study,beopen,beclosed,keep,have,beaway,bemarried,beasleep,beill等。如：fortwenty-t
2、hreeyearsIhaveworkedheresince1991.sincetwenty-threeyearsago自从1991年以来我就在这儿工作。WehavelearnedEnglishforthreeyears.sincethreeyearsago我们学英语3年了。注意：1）since+时间点，for+时间段，如：sincelastweek,fortwodays。since2012我买了这辆自行车三年了Wehavehadthisbikeforthreeyears.sincethreeyearsagoFillintheblanks.1.—Ho
3、wlonghaveyoulivedhere?—I’velivedhere____twentyyears.2.Yes,I’vebeenhere_____1976.3.Wehaven’tseeneachother______lastweek.4.MyparentsandIhavebeeninHongKong____twodays.forsincesincefor5.Jeffhashadhisbike____morethan10years.for6.Amyhashadthetoybear______shewasababy.since7.Amyhashad
4、herfavoritebook____threeyearsago.since2.短暂性动词(come,go,leave,buy…)可以用于现在完成时。但不能用于带有for或是since的肯定句中。HehasleftBeijingforaweek.HehasnotleftBeijingyet.(×)(√)3.短暂性动词变为延续性动词的现在完成时构成举例：buyhave/hashadborrowhave/haskeptarrivehave/hasbeenin/atleavehave/hasbeenawayopenhave/hasbeenopenclos
5、ehave/hasbeenclosedjoinhave/hasbeeninhave/hasbeenamemberofdiehave/hasbeendeadmarryhave/hasbeenmarriedcome/gohave/hasbeenin/atbegin/starthave/hasbeenonfinish/stophave/hasbeenoverfallasleephave/hasbeenasleepwakeuphave/hasbeenawakebecomehave/hasbeenTheoldmandiedtwoyearsago.这个老人两年
6、前死了。Theoldmanhasbeendeadfortwoyears.这个老人死了两年了。Heboughtacarfiveyearsago.他五年前买了一辆轿车。Hehashadthecarforfiveyears.这辆轿车他买了五年了。Rewritethesentencesusingfororsince.(4a)1.JimisinJapan.Hearrivedtherethreedaysago.JimhasbeeninJapanforthreedays.2.Theyareveryhungry.Theirlastmealwastenhoursag
7、o.Theyhavenoteatenfortenhours.Theyhavebeenveryhungryfortenhours.×(Althoughtheirlastmealwastenhoursago,itisn’tlogicalthattheygothungryimmediatelyaftertheyhadtheirlastmeal.)3.Ihaveacamera.Iboughtitin2009.Ihavehadacamerasince2009.4.IknowAnna.Ifirstmetherthreeyearsago.IhaveknownAn
8、naforthreeyears.5.Lindaisill.ShebecameillonMonday.Lindahasbee
