过去进行时when和while

Experienceisthebestteacher.实践出真知。1过去进行时的讲与练一、含义：(1)过去进行时表示过去某一时刻或者某段时间正在进行或发生的动作，常和表过去的时间状语连用。(2)过去进行时表示感情色彩与现在进行时相似，过去进行时也可表示满意、称赞、惊讶、厌恶等感情色彩，也通常与always，forever等副词连用。e.g：Theywerealwaysquarrelling.他们老是吵架。二、过去进行时的构成和用法：肯定形式：主语+was/were+doing否定形式：主语+wasnot(wasn't)/werenot(weren't)+doing疑问形式：Was/Were+主语+doing。常与之连用的时间状语有，atthattime/moment,(at)thistimeyesterday(lastnight/Sunday/week…),at+点钟+yesterday(lastnight/Sunday…)，when和while引导的时间状语从句。三、when/while引导的时间状语从句①由when/while引导的时间状语从句。常用句型：a.主句（主语+was/were+doing…when+一般过去时的句子）；表示主句动作发生的过程中，另一个意想不到的动作发生了。Weweretalkingwhentheteachercamein.=Whileweweretalking,theteachercamein.b.主句（主语+was/were+doing…while+主语+was/were+doing…）；主句与从句的动作都是延续性动词或同时发生的，两句都用过去进行时的时候，多用while引导★★★注意：when和while的区别：都意为“当……时候”，when引导的句子谓语动词用短暂性动词或延续性动词都行；但while引导的句子谓语动词只能用延续性动词，不能用短暂性动词。②when和while还可作并列连词。when表示“在那时”；while表示“而，却”，表对照关系。Thechildrenwererunningtomovethebagofricewhentheyheardthesoundofamotorbike.孩子们正要跑过去搬开那袋米，这时他们听到了摩托车的声音。Heislisteningtomusicwhilehisbrotherisplayingcomputer.他正在听音乐，而他弟弟却在玩电脑。短暂性动词是非延续性动词，即动作一开始便结束的动词，如come,go,begin,start,become,join,end,die,buy,arrive,reach,borrow,lend,gettoknow等。持续性动词，如learn,study,work,play,wait等练习：用when或者while填空。（1）wewerewaitingforthebus,agirlranuptous.（2）IwastelephoningafriendBobcamein.（3）Jimjumpedonthebusitwasmovingaway.Experienceisthebestteacher.实践出真知。2（4）Shewantedtostayinbedtheotherswereworkinginthefields.（5）motherwasputtingCathytobed,thedoorbellrang.（6）Hewaslisteningtomusichewasridinghisbike.（7）Theydidn’tmakeamodelshipIsawhim.（8）Heisstronghisbrotherisweak.四、一般过去时与过去进行时的用法比较：一般过去时表示“在过去某个时间发生的动作或存在的状态”，而过去进行时则表示“在过去某个特定时间正在进行的动作”。如：Tomwrotealettertohisfriendlastnight.汤姆昨晚给他的朋友写了封信。（信写完了）Tomwaswritingalettertohisfriendlastnight.汤姆昨晚一直在给他的朋友写信。（信不一定写完，只是强调了动作的延续性）。过去进行时练习一、用动词的适当形式填空。1.it(rain)whenyouleftschool?2.Oneday,Edison(wait)foratraintoarrive,andsuddenlyalittleboyrantothetrack(轨道)toplay.3.She(make)herdressthewholeafternoon.4.Whenwe(arrive)atthevillage,it(get)darkandit(rain)hard.5.Laterhisparentsfoundthathe(sit)onsomeeggs.6.Whenheknockedatthedoor,myaunt(cook)7.Thereweresomestudents(sing)and(dance)happilyontheplaygroundatthattime.8.I(notwrite)aletterwhenthedoorbellrang.9.Wehadnoclassedatthattime.We(plant)trees.10.Ilikebasketballwhilemybrother(like)football.11.Thefarmers(work)inthefieldsyesterday.12.WesawLily(pick)applesinthefieldlastSunday.13.Whenspringcomes,thesnow(appear).二、选择题。（）1.I______amealwhenyou_____me.A.cooked,wereringingB.wascooking,rangC.wascooking,wereringingD.cooked,rang（）2.Hesaidhe_____todrawaplaneontheblackboardatthattime.A.triesB.triedC.wastryingD.willtry（）3.Whileshe______TV,she______asoundoutsidetheroom.A.waswatching,washearingB.watched,washearingC.watched,heardD.waswatching,heard（）4.They_____afootballgamefrom7to9lastnight.A.werewatchingB.watchC.watchedD.arewatching（）5.Whatbook____you______whenI____youatfouryesterdayExperienceisthebestteacher.实践出真知。3afternoon?A.did,read,wasseeingB.did,read,sawC.were,reading,sawD.were,reading,wasseeing（）6.ItwasFridayevening.MrandMrs.Green_____readytoflytoEngland.A.aregettingB.getC.weregettingD.got（）7.LeiFeng_____always_____ofotherswhenhe______inthearmy.A.is,thinking,wasB.was,thinking,isC.did,think,isD.was,thinking,was（）8.Agirl______mypenfalloffthetablewhenshe_____me.A.saw,passedB.wasseeing,passedC.wasseeing,passedD.wasseeing,waspassing（）9.We____forTomattenlastSunday.Heoftenkeptus______.A.werewaiting,waitingB.werewaiting,waitC.waited,waitingD.waited,wait（）10.He____hisfatheronthefarmthewholeafternoonlastSaturday.A.helpsB.wouldhelpC.washelpingD.ishelping（）11.Whilemother_______somewashing,I_____akiteforKate.A.did,madeB.wasdoing,madeC.wasdoing,wasmakingD.did,wasmaking（）12.“_______youangrythen?”“They______toomuchnoise.”A.are,weremakingB.were,weremakingC.are,madeD.were,made（）13.He____somecookingatthattime,so_____meA.did,heardB.did,didn’thearC.wasdoing,heardD.wasdoing,didn’thear（）14.ThistimeyesterdayJack_____hisbike.He_____TVA.repaired,didn’twatchB.wasrepairing,watchedC.repaired,watchedD.wasrepairing,wasn’twatching（）15.Hisparentswantedtoknowhowhe_____onwithhisnewclassmates.A.wasgettingB.getsC.isgettingD.willget（）16.Isawhim____therabbitjustnow.A.tofollowB.playsC.playing（）17.Tony____downfromhisbikewhenherodetoschool.A.fallsB.fellC.felt（）18.Whenhewasasmallchild,Ioftensawhim_____down.A.fallB.fellC.felt（）19._____Tonywasridinghisbike,hehadanaccident.A.WhenB.WhileC.AandB（）20.Theteachercameintotheroom_____wewerewriting.A.afterB.asC.while（）21.WhenJimmyenteredtheroom,everyone_____him.A.wassmilingtoB.weresmilingatC.wassmilingat（）22.-Whydidn’tyougotothecinemawithusthatafternoon?Experienceisthebestteacher.实践出真知。4--I_____atthestationformyunclefromBeijing.A.waswaitingB.havewaitedC.waited三、句型转换。1.Shesawacat.Itwassittinginthetree.(改为同义句)Sheacatinthetree.2.Isawthemplayinggamesjustnow.(改为同义句)Isawthattheygamesjustnow.3.Themanwaswalkingdownthestreet.Itbegantosnow.(合并为复合句)Itbegantosnowthemanwaswalkingdownthestreet.4.ItstartedtorainwhileIwasgrowingsomeflowersinthegarden.(改为同义句)Iwasgrowingsomeflowersinthegardenitstartedtorai