present(now)futurepast现在完成时(presentperfecttense)domyhomework例句：1.Ihavecleanedmyroom.我已打扫了房间。2.Hehasn’tfinishedhishomework.他还没完成作业。3.Haveyoureadthisnovel?你看过这本小说吗？Yes,Ihave.是的，看过了。No,Ihaven’t.不，没看过。4.WehavestudiedEnglishfortwoyears.我们已经学了两年英语了。5.Theyhaven’tseeneachothersince1998.自从1998年他们就没再见过面。例句：6.Hashegonetothelibrary?他是去了图书馆吗？Yes,hehas.是的，是去那里了。No,hehasn’t.不，他没去那里。7.HowlonghasMrsSmithbeeninBeijing？Smith夫人来北京多长时间了？(在上述句型中,我们可以看到在现在完成时中，用到了动词的一种新的形式---过去分词,有关过去分词的构成我们在下面给大家归纳一下。)现在完成时一.构成:have/has+done(过去分词)过去分词(pp)其变化方法和动词过去式基本相同。有部分不同，需要记好。HehaslivedinShenzhenfor4years.HashelivedinShenzhenfor4years?Yes,hehas./No,hehasn’t.过去分词的构成分为规则变化和不规则变化两种：规则变化:a)一般情况下，在动词后直接加ed,如play---played，work---worked，water---watered,finish---finished等;b)以“辅音字母+y”结尾的动词,把y变成i再加ed,carry---carriedstudy---studied等;c)以一个辅音字母结尾的重读闭音节的动词要双写最后一个辅音字母，再加ed如:stop---stopped，shop---shopped等。不规则变化：见不规则动词表点击→不规则动词表练习1：写出下列动词的过去分词：put---hear---come---make---hurry---watch---swim---be---talk---want---study---stop---take---see---like---抄写动词以及过去式和过去分词。1.be--2.come—3.go--4.do—5.have--6.drink—7.give--8.eat–9.know--10.make—11.run--12.say—13.see--14.find—15.draw--16.get—17.hear--18.begin—19.buy--20.leave—was/were--beencame--comewent--gonedid--donehad-haddrank--drunkgave--givenate--eatenknew--knownmade--maderan--runsaid--saidsaw-seenfound--founddrew--drawngot--gotheard-heardbegan--begunbought--boughtleft--left二:用法:1)现在完成时表示过去发生的动作,并对现在有影响。Someonehasbrokenthewindow.(窗户现在是坏的)Ihavealreadylostthekey.(我现在没有钥匙)Ihaven’treadthatbookyet.(不了解书的内容)Ihavejustcleanedmyhands.(手是干净的)常与already(已经),yet(已经),just(刚刚),ever(曾经)等词连用.already:常用于肯定句中.yet:常用于否定句,疑问句尾.Samgotsicktwodaysago.Samhasbeensickfortwodays.Sherrygotherdriver’slicense(执照)in1999.Sherryhashadherdriver’slicensesince(自从)1999.ArnoldstartedtoplaytennisinJan.ArnoldhasplayedtennissinceJan.MaggiemovedtoHawaiiin1996.MaggiehaslivedinHawaiiforabout8years.现在完成时二:用法:2)现在完成时表示从过去一直持续到现在的动作或状态。ShehaslearnedEnglishfor5years.HehaslivedinBeijingsince(自从)hewasborn.Haveyoustayedheresince(自从)3o’clock?常与for,since引导的时间短语或从句连用.for+时间段since+时间点,since+句子since:(自…以来)1)since+时间点Hehasstayedheresince5o’clock.2)since+时间段+agoHehasstayedheresince5hoursago.3)since+从句ShehastaughtEnglishsincehecamehere.for:(长达）for+时间段Hehaskeptthebookfor2weeks.since,for的用法:Takenotes用for或since填空1.Mr.BrownhashadhisTV________15years.2.I’vetakendrivinglessons_________lastmonth.3.Mysisterhashadhercellphone________amonth.4.Myfriendshaven’tvisitedme___________mybirthday.5.Wehaven’tusedourcar________alongtime.6.Shehasn’thadagoodcupofcoffee_________years.7.Tomhaswornglasses_________hewas7yearsold.forsinceforsinceforforsince常用于现在完成时的时间副词,介词:already(已经):用于肯定句Ihavealreadypostedtheletter.yet(已经):用于否定句,疑问句Hehasn’tdonehishomeworkyet.just(刚刚)Theyhavejustleft.eve...
