现在完成时态（二）概念：表示动作或状态在过去开始，一直持续到现在，并且有可能一直持续下去。句中的动词必须是延续性动词，常与for+时间段和since+时间点连用。Ihavewaitedforyoufor2hours.Shehaslivedherefor10years.YouhavelearnedEnglishfortwoyearsandahalf.WangLinhasplayedthepianofor6months.Shehascollectedcoinssince2000.IhavetaughtEnglishsince5yearsago.Myfatherhasworkedinthefactorysincehecamehere.1).for+时间段1).since+过去具体的一个时间点。如,年,月,日,几点等eg.since1990自从1990年起since5o’clock自从5点起2).since+时间段+agoeg.since3monthsago3).since+一般过去时的从句eg.sinceyoulefthomeeg.Ihavebeenateacher______ayear.Hehasbeenatthisschool_______1992.Wehavelearned1,000Englishwords_______wecametothisschool.forsincesince•____threeyears•____twomonthsago•____lastyear•____2011•____yesterday•____6o’clock•____6hours•____twohoursago•____Iwasachild•____twoyears1.—Howlonghaveyouhadthatbikeoverthere?—I’vehadit____threeyears.2.Jeffhashadhisbike____morethan10years.3.Yes,I’vehadit____sevenyears.4.Amyhashadherfavoritebook____threeyears.5.Amyhashadthetoybear______shewasababy.forforforforsinceFillintheblanks.1.—Howlonghaveyoulivedhere?—I’velivedhere____twentyyears.2.I’veworkedhere_____1976.4.MyparentsandIhavebeeninHongKong____twodays.5.Hehastaughthere_____hecametoChina.6.Wehavebeenfriends_____wemetinschool.forsincesinceforsince有些动词本身不具有延续性，buy买borrow借puton穿上come/go/arrive/become来/去/到达/变成die死亡finish结束begin开始leave离开fallasleep入睡close关闭open打开不能与for+时间段,since+时间点连用。Theoldmandied4yearsago.=Theoldmanhasbeendeadfor4years.=Theoldmanhasbeendeadsince4yearsago.=Itis4yearssincetheoldmandied.=Ithasbeen4yearssincetheoldmandied.HejoinedtheParty2yearsago.=HehasbeeninthePartyfor2years.=HehasbeeninthePartysince2yearsago.=ItistwoyearssincehejoinedtheParty.=IthasbeentwoyearssincehejoinedtheParty.1.Iboughtthephonesixmonthsago.2.Heborrowedmypentwohoursago.3.Sheputonhercoatwhenshewentout.4.TheycametoGermanywhentheywereyoung.5.Tomwenttoschoolwhenhewassix.6.Hediedfiftyyearsago.7.Themoviebeganthreehoursago.8.Helefthishometown20yearsago.9.Thebabyfellasleepwhentherainstormcame.将下列句子转换为since/for句型buy买have有borrow借keep保留puton穿上wearcome/go/arrive/become来/去/到达/变成be在/是die死亡bedead是死亡的finish结束beover是结束的begin开始beon在上映/已开始leave离开beaway远离的fallasleep入睡beasleep睡着close关闭beclosed关着的open打开beopen打开着的非延续性动词和延续性动词的转换leave—beawayborrow—keepbuy—havebegin/start—beondie—bedeadfinish---beovergetup—beup,comehere—behere,join--bein+组织机构/beamemberof+组织机构,gothere—betherebecome—be,comeback—bebackfallasleep—beasleepopen---beopenclose---beclosedgetmarried—bemarriedfallill—beillgetto/arrive/reach—be(in),leave—beawayfrom,gettoknow—know，puton—wear,catchacold—haveacoldcome—bein/at1.JimisinJapan.Hearrivedtherethreedaysago.__________________________________2.Theyareveryhungry.Theirlastmealwastenhoursago.________________________________________________________________Rewritethesentencesusingfororsince.JimhasbeeninJapanforthreedays.Theyareveryhungrybecausetheyhaven’thadtheirmealfortenhours.4a3.Ihaveacamera.Iboughtitin2009._______________________________4.IknowAnna.Ifirstmetherthreeyearsago.___________________________________5.Lindaisill.ShebecameillonMonday.____________________________________Ih...
