现在完成时since和for的用法

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1、现在完成时Since和for的用法Since和for的用法　　表示过去已经开始持续到现在的动作或状态常用的时间状语有：for,since,howlong,sofar,thesedays等。　　Since+过去点的时间，for+一段时间(数词+量词)，此划线部分用howlong提问。　　一、since短语或从句表示过去的动作延续至今，since之后的时间为一点。如：　　Mr.Smithhasworkedheresince1984.1984年以来，史密斯先生一直在这工作。　　He’slearnedabout5,000Englishwordssin

2、cehewenttocollege.他上大学以来大约学了五千个英语单词。　　二、for短语表示动作延续多长时间，for的宾语为时间段。如：　　Wehaveknowneachotherfortwentyyears.我们认识有二十年了。　　Ihaven’tseenherforalongtime.我好久没有见到她了。　　练习：用since和for填空　　1)______twoyears2)_______twoyearsago3)_______lastmonth　　4)______19995)_______yesterday6)_______4o’c

3、lock　　7)______4hours8)_______anhourago9)_______wewerechildren　　10)_____lunchtime11)______shelefthere　　1.HehaslivedinNanjing________theyearbeforelast.　　2.I’veknownhim__________wewerechildren.　　3.OurteacherhasstudiedJapanese_________threeyears.　　4.Shehasbeenawayfromthecity___

4、________abouttenyears.　　5.It’sabouttenyears__________sheleftthecity.　　2.短暂性转换延续性　　①arriveat/insw.getto/reachsw.come/go/movetosw.　　→beinsw./atschool/athome/onthefarm/behere/bethere　　1)HegottoBeijingfiveminutesago.　　He__________________________Beijingfor__________________.　　2

5、)ImovedtotheUSAlastyear.　　I__________________________theUSAsince____________________.　　3)Iwenthomeyesterday.　　I________________________homefor___________________.　　4)Theycameherelastweek.　　They__________________heresince___________________.　　②come/goback,return→bebackcome/g

6、oout→beout　　1)Hecameouttwoyearsago.　　He____________________________for____________________.　　2)WereturntoFuzhouyesterday.　　We_________________________toFuzhousince__________.　　③become→be　　1)Ibecameateacherin2000.　　I__________________ateacherfor__________________.　　2)Therive

7、rbecamedirtylastyear.　　Theriver__________________dirtyfor___________________.　　④close→beclosedopen→beopen　　1)Theshopclosedtwohoursago.　　Theshop__________________________for__________________.　　2)Thedooropenedatsixinthemorning.　　Thedoor________________________forsixhours.　　⑤

8、getup→beupdie→bedead　　leavesw.→beawayfromsw.　　fallasleep/gettotsleep→beasleep　　fin