时间状语从句讲解和练习

时间状语从句用句子表达一件事情或一个行为发生的时间，这个句子就叫时间状语从句。时间状语从句根据其所表示的时间不同，所使用的连词也不同。下面我们一起来看一下几个常见的时间状语从句：when引导的从句：表示主句的动作和从句的动作同时发生，或从句的动作发生在主句动作之前。例如：Iwasgoingoutwhenavisitorcame.(动词动作同时发生。)我正要出门，有客人来访。Ishalltellherthegoodnewswhenshecomes.她来时，我将告诉她这个好消息。小试牛刀:Ifoundmothercookingforme.Igothome.(when)HewaslisteningtotheradiowhenIhome.(get)while引导的从句：表示’当……过程中”，强调某一段时间内主句和从句中谓语动词所表示的动作在同一时期发生。由于while从句表示一个持续的行为，所以从句中要用持续性动词，并且持续性动词常用进行时态。例如：KeepaneyeonmylittlesisterwhileIamaway.我不在时，请照看一下我的小妹妹。WhilewewerewatchingTV,Jimcamein.我们看电视的时候，Jim进来了。小试牛刀:Itstartedtorain.Wewereplayingfootball.(while)LucywascleaningtheroomLilywaslisteningtomusic.as引导的时间状语从句：表示当的时候；一边一边；随着"，其从句的主语与主句的主语往往是同一人或物。例如:Shesangassheworked.她——边工作——边口昌歌。=Shewassingingasshewasworking.Isawhimashewasgettingoffthebus.正当他下公共汽车时，我看见了他。小试牛刀：wewalked,wetalked.Youwillgrowwiseryougrowolder.before引导的从句：一般表示主句的动作发生在从句动作之前。例如：Ididn'tknowanyEnglishbeforeIcamehere.我到这儿来之前，一点英语都不懂。例如:Ihadwrittenmyreportbeforemyfathercameback.小试牛刀:Heboughtthetickethewenttoseethefilm.after引导的从句：表示主句的动作发生在从句动作之后。例如：Afterhelockedthedoor,heleft.他锁上门后，就走了。Afterhehadfinishedhiswork,heplayedagameofchesswithhisfriend.他做完工作后,和朋友下了——盘棋。/J、试牛刀:Iwillgoouttoplaybasketballwithyou.Ifinishmyhomework.(after)Helefttheclassroomhehadfinishedhishomeworktheotherday.since引导的从句：表示’自从……以来”，从句中的动词一般表示动作的起点，用过去时。主句中的动词表示动作延续的情况，一般用现在完成时。如果主句中的动词表示的不是延续的动作而是表示目前的状态，可用一般现在时。例如:Sincehemetthisgoodfriend,hehasmadegreatprogressinhisstudies.自从遇见了这个好朋友，他已在学习上取得了巨大的进步。例如：ItistwentyyearssinceshejoinedtheParty.她入党二十年了。〔主句中的动词表示的是状态，用现在时。〕小试牛刀:itisfiveyearssincewelasttime.〔meet〕Mrgreenhastaughtinthatschoolsincehe(come)toChinathreeyearsago.until引导的从句：表示一个动作持续到某一时刻。〔1〕表示直到……”，如果主句中的谓语动词是延续性动词时，用肯定或否认形式都可以，但表达的意思不同。〔2〕表示直到……才”，主句用否认式，从句用肯定。如果主句中的谓语动词是瞬间动词时，必须用否认形式。例如：Theyworkeduntilitwaslate.他们一直工作到大黑。Shedidn'tgotobeduntilshefinishedherhomework.她写完作业才睡觉。/J、试牛刀:Allthepeopleleft.Hewaited.(until)Hewenttobed.hisfathercamehome.assoonas引导的从句表示—就"，强调动作紧密相连。例如:Assoonasshecametotheclassroom,shebegantoreadEnglish.她——至V教室，就开始读英语。小试牛刀:Westarttosing.It''s12o"clock.(assoonas)bythetime至U。。。为止（所在句子的主句应用完成时）例如：Bythetimehegetsthere,hisfatherhasalreadygone.他到家的时候，他爸爸已经走了。小试牛刀：BythetimeIgottoschool,theclass.〔begin〕我到校时，已经开始上课了。知识扩展itis+时间段+since+一般过去时〔从。。。以来多长时间了〕例如：itisfiveyearssincewemetlasttime.从我们上次见面已经五年了。itwas+时间段+before+一般过去时过了很长时间我才睡着。过了一个小时，警察才来。（。。。才）itis/willbe+时间段+before+一般现在时例如:itisalongtimebeforeIgotosleep.itwasanhourbeforethepolicearrived.小试牛刀:It(be)tenyearssincewe(leave)thatcity.ItisreportedthatitmaybetwoorthreemonthsitispossibletotestthismedicineonanimalsHowlongdoyouthinkitwillbeChinasendsamannedspaceshiptothemoon?3、when和while的区别连词区别所接动词例句when主从句同时发生、先后发生瞬间性动词、持续性动词WhenyouarriveinLondon,pleasegiveusacall.Whenhewashavinghislunch,heheardthedoorbellring.as主从句同时发生、一边••一边…、随着持续性动词Astimewenton,hegrewmoreandmoreimpatient.Aswewalked,wetalked.while主从句同时发生然而、既然持续性动词Whileshewasreadinganovel,hermotherwascookingthedinner.Somepeoplewastefoodwhileotherhaven'tenough.—I'mgoingtothepostoffice.—Whileyou'rethere,canyougetmesomestamps?4、巧记10个瞬间性动词在学习以when和while引导的时间状语从句时，用到了瞬间动词和延续动词。常见的瞬间动词有die（死）,come（来）,go（去）,eave（离开）,arrive（到达）,begin（开始）,buy（买）,,join（加入）,borrow（借进,借出），return（归还）等。这10个瞬间动词可用两句口诀来帮助记忆：开始离去，借来还，出生入死，买到家。注释："开始离去，借来还"为begin,leave,go,borrow,come,return六词；"出生入死，买到家"为join,die,buy,arrive四词。各词改为相应的延续动词为：beginbeon,leavebeawayfrom,borrowkeep,gobe,comebehere,returnbeback,joinrbein,diebedead,buyhave,arrivebehere等。'5、状语从句与主句的时态问题由when、while引导的时间状语从句的时态：〔主过从过〕主句〔过去进行时〕+when+从句〔一般过去〕主句〔一般过去时〕+when+从句〔过去进行时〕主句〔一般过去时〕+while+从句〔过去进行时〕主句〔过去进行时〕+while+从句〔过去进行时〕注意：看动词为短暂性动词用一般过去时，动词为延续性动词则用过去进行时。小试牛刀：Mother〔cook〕supperwhenI(get)homeyesterday.LastSundayI(meet)LinHongwhenI(walk)inthestreet.Whenthestudents(have)ameeting,theteacher(come)in.WhileHanMeimei(sweep)thefloor,Lucy(carry)water.由when、after、before、bythetime引导的时间状语从句的时态：主句、从句的谓语动词都已完成，则先发生的动作用过去完成时，后发生的动作用一般过去时。例如:Afterhehadfinishedhiswork,heplayedagameofchesswithhisfriend.小试牛刀:Whenthey(get)tothecinemalastlight,thefilm(start).I(go)outwithmyfriendsafterI(finish)allthehomeworklastnight.时间状语从句与主句的时态不一致。〔主将从现：主句用将来时，而时间状语从句用一般现在时〕小试牛刀:AssoonasIreachCanada,Iyouup.(ring)IwillcallyouassoonasItheresult.(know)He(become)asoliderwhenhe(grow)up.He〔wait〕untiltherain.(stop)一、单项选择。Themeetingdidn'tstarteveryonewasthere.A.BecauseB.untilC.whyD.ifTheboytobedhismothercamein.A.wentnot;untilB.didn'tgo;afterC.went;untilD.didn'tgo;untilHewaituntiltherain.A.won't,willstopB.won't,stopC.will,stopsD.will,willstopAssoonasJanehere,I'llpostthelettertoMikeA.leaveB.willleaveC.leavesD.leftItwasalreadyfiveo'clockwegothome.A.whenB.whileC.becauseD.if—I'mgoingtothepostoffice.—you'rethere,canyougetmesomestamps?A.AsB.WhileC.BecauseD.IfJoanandMaryhaven'tseeneachothertheyleftschoolfiveyearsago.A.asB.beforeC.afterD.sinceIwillletyouknowaboutitassoonasIthenews.A.willgetB.getsC.gotD.getHebackuntiltheworkdone.A.isn't;willbeB.isn't;isC.won'tbe;willbeD.won'tbe;isIcallthepoliceforhelpIsawthethief.A.whileB.beforeC.assoonasD.after11Theydidn'tstarttheworktheirteachercameback.A.untilB.whileC.assoonasD.ifTomwillcallmeassoonasheShanghai.A.arrivesB.willreachC.arrivesinD.gettoI'msurehe'llcometoseemebeforeheBeijing.A.willleaveB.isleavingC.leaveD.leavesIwilltellhimthenewsassoonasheback.A.comeB.comesC.willcomeD.came15.Iwon'tbelieveyouIhaveseenitwithmyowneyes.A.beforeB.untilC.afterD.when16.Hehomeshewassatisfiedhisansweryesterday.A.didn'tgo;until;withB.wasn'tgo;after;toC.doesn'tgo;before;withD.didn'tgo;until;to二、用方框中的单词填空。when、before、after、as、since、while、until、assoonasMumwasmakingcookiesinthekitchenthetelephonerang.IwaswatchingTVmywifewascooking.Hehadworkedinafactoryfortwoyearshewenttocollege.IshallplaychesswithyouIfinishwatchingTV.Hedidn'tgettotheairportitwasdark.Shesangshewentalong.Ihaven'theardfromhimhewenttoAmerica.Wefoundthebookstwodayshehadgoneaway.三，完成句子。他进来时，我在吃饭。,Iwaseating.我在那封信寄到之前去北京了。IhadleftforBeijingjust.当我在玩电脑游戏时，爸爸在听音乐。Fatherwaslisteningtomusicthecomputergames.当我有时间，我就去看望我的爷爷。Iwillvisitmygrandpa.他一到学校就把一切都准备好了。Shegoteverythingready.你一到上海就给我打个好吗？WillyoupleasecallmeyougettoShanghai.他长大后相当一名记者。Hewantstobeajournalist. 答案 八年级地理上册填图题岩土工程勘察试题省略号的作用及举例应急救援安全知识车间5s试题及答案 ：1-5BDCCA6-10BDDBCACDBBA答案:whenwhile3.before4.assoonas5.until7.since8.afterWhenshecameinbeforetheletterarrivedWhileIwasplayingwhenIhavetimeassoonasshegottoschoolassoonaswhenhegrowsup.1、答案：WhenIgothome,Ifoundmothercookingforme./IfoundmothercookingformewhenIgothome.2、答案：Westarttosingassoonasit''s12o"clock.3、答案：IwillgoouttoplaybasketballwithyouafterIfinishmyhomework.4、答案：Hewaiteduntilallthepeopleleft.5、答案：Itstartedtorainwhilewewereplayingfootball