现在完成时态和一般过去时态的区别

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1、Unit26MakingJourneysUnit26P100现在完成时态和一般过去时态的区别主要从时间状语上来区别Sheboughtabookonthewaytoschool.Shewaslatefortheclassthismorning.Shewasbornin1980.Ihadagoodmealthismorning.现在完成时态Ihavealready(just/never/ever)boughtacar.Shehasnotfinishedhisbookyet.Greatchangeshavetakenplaceinthepastfewyears.Ihavebee

2、nherefortwentyyears.IhavelivedinNingBosince1980Ago10daysagoIn1987WhenhewasyoungLastyearLonglongagoOnedayEverNeverAlreadyYetJustInthepastfewyearsFor10yearsSincelastyearby强调的是到某个时间前某事已经发生，包括这个时间点在内；而before强调的是在某个时间点之前，不包括这个时间点在内。till则是强调动作一直持续到这个时间点为止，有时表示动作或状态持续时间比较长P100by/till/untilForexa

3、mple:I’llbebackbythree.我三点以前回来。Itbegantorain,justbeforemidnight.就在午夜前天开始下雨。Theytalkedtilloneo’clockthismorning.他们一直谈到深夜一点。注意:not…..untilhedidn’tgotobeduntilhefinishedhishomework.Hewasn’tlateforclassuntilhelosthiswatch.Hedidn’tgothereuntilhehadsomethingtodo.Tell----toldTellsbsthtellmeastor

4、yTellalie/astory.TellsbaboutsthtellhimaboutthatthingTellsbtodosth/tellsbnottodosthtellhimtofinishitTellsbthatTomsaidtome“Iwanttogo”.Tomtoldme(that)hewantedtogoP93情态动词Can能够IcansaymyABC.Canyouhelpme?=couldyouhelpme?=whatcanIdoforyou?猜测：hecannotbepoor.（对否定推测）hemustbeadoctor.（100%肯定）hemaybeas

5、tudent.（不太肯定）对过去的推测Musthavedone对过去肯定的推测地是湿的，昨晚肯定下雨了Itmusthaverainedlastnight,becausethegroundiswet.hemusthavelefthiskeyintheoffice.Canbe/doCanIhelpyou?Hecan’tbehere.isawhiminthestreetjustnow.Couldhavedone本能做某事而实际未做;可能做某事，但可能性很小Hecouldhaveleftearly.Tomcouldhavecomeontime.Theycouldhaveborro

6、wedmoneyfrommeyesterday.Shouldhavedone本应该干某事而实际未干Youshouldhavefinishedyourhomeworkyesterday.Heshouldhaverepaidmymoney.Jimshouldhavecometocollege.IshouldhavecometohelpyoubutIwastoobusy.Ihavenoideawhostolehiswallet.it___anyoneA.couldhavebeenB.shouldhavebeenC.musthavebeenP93不定代词Somesomething

7、somebodysomeoneIhavesomefriendshere.shehassomemoney.Wouldyoulikesomeapples?（疑问句希望得到对方肯定的回答）someoneiswaitingforyou.Ihavesomethingimportanttotellyou.SomeIhavesomemoneyIhavesomefriends.Wouldyoulikesomeapples?AnyIhavenotanyfriendsDoyouhaveanyquestions?Youcanvisitmeanyti