Unit4语法时间状语从句讲义练习牛津译林版九年级英语上册

译林九年级上U4语法时间状语从句讲义+练习定义：在句中作时间状语成分的从句，可放在句首、句中或句尾。【辨析1】before&after（1）before：“在...之前”，表示主句动作发生在从句动作之前例：Closethewindowsbeforeyouleavetheroom,please.（在你离开房间前，请关上窗。）★注意：beforelong：“不久”例：Beforelonghetookovertheeditingofthemagazine.（不久，他接手了杂志的编辑工作。）longbefore：“很久以前”例：Shesaidshehadseenthefilmlongbefore.（她说她很早就看过这部电影。）（2）after：意思是“在...之后”，表示主句动作发生在从句动作之后。例：IwenttoschoolafterIfinishedmybreakfast.（我吃完早饭后去上学。）【辨析2】when&whilewhen：①“当...时”，表示主句动作和从句动作同时/先后发生。从句可用延续性/瞬时性动词例：WhenIlivedthere,Imadequiteafewfriends.（我住在那里时，交了不少朋友。）→动作同时发生，lived为延续性动词WhenIgotthere,thetrainhadleft.（当我赶到那里时，火车已经开走了。）→主句动作先发生，从句动作后发生，got为瞬时性动词②“既然，考虑到”例：It’snowonderyou’vegotaheadachewhenyoudranksomuchlastnight.（考虑到你昨晚喝了那么多酒，难怪会头疼。）③常用搭配bedoing...when...：正在...这时...例：Jackwasworkinginthelabwhenthepowercutoccurred.（杰克正在实验室工作，这时断电了。）beabouttodo...when...：正要...这时...例：Wewereabouttostartwhenitbegantorain.（我们正准备出发，这时天空下起了雨。）★注意1：如果when引导的时间状语从句的主语与主句主语相同，而从句的谓语又是be动词时，那么从句中的主语和be可以省略。如：Whenyouareintrouble,askherforhelp.（当你遇到困难时，向她寻求帮助。）→Whenintrouble,askherforhelp.注意2：当when引导的时间状语从句的主语与主句主语相同时，往往还可以用“when＋分词”的形式替代该状语从句。如：WhenIcameintotheroom,Ifoundhimlyingthereasleep.→Wheningintotheroom,Ifoundhimlyingthereasleep.注意3：在时间状语从句中，不能用任何一种将来时，如：一般将来时、过去将来时态或将来完成时，而要用相应的一般现在时态、一般过去时或现在完成时来代替。如:I'lltelephoneyouassoonasIgetthere.Shesaidshewouldphonemeassoonasshegotthere.Don'tgetoffthebusuntilithasstopped.（2）while：从句谓语动词必须是延续性动词例：Itwasraininghardwhilewegotthere.❌→get为非延续性动词，此时只能用when★注意：主句谓语动词为延续性时：译为“与...同时”例：Whilemywifewascooking,IwaswatchingTV.（妻子做饭的时候，我在看电视。）主句谓语动词为瞬时性时：译为“在...期间”例：AstrangercameinwhileIwasdoingmyhomework.（我正在做作业时，一个陌生人走了进来。）while有时还可以表示对比。例：Ilikeplayingfootballwhileyoulikeplayingbasketball.（我喜欢踢足球，而你喜欢打篮球。）→对比【辨析3】since&till&until①since：“自从...”，通常主句用现在完成时，从句用一般过去时例：SinceIlastwrotetoyou,alothashappenedtomeinthe12months.（自从我上次给你们写信以来，这12个月里我发生了很多事情。）常用句型：Itis/hasbeen+时间段+since...：自从...有多长时间了例：Itistwohourssincehelefttheclassroom.（他离开教室已经两个小时了。）IthasbeenyearssinceIenjoyedmyselfsomuch.（我已经很多年没有这么开心过了。）②till&until：“到...为止”，一般可互换，但till只能用于肯定句，且不能位于句首，而until可以位于句首。例：Iworkeduntil/tillhecameback.（我一直工作到他回来。）Untilyouarrived,Iwasfeelingquitelonely.（在你来之前，我感到非常孤独。）★注意：如果主句中的动词是瞬时动词，必须用否定形式，即not...until结构，表示“直到...才开始”；如果主句中动词是延续性动词时，用肯定或否定形式都可以。例：IdidnotgotobeduntilIfinishedmyhomework.（直到做完作业，我才上床睡觉。）Walktill/untilyouseeawhitehouse.（一直走到你看到一座白房子为止。）【辨析4】assoonas&whenever①assoonas：“一...就...”，表示从句动作一发生，主句动作马上就发生例：Theboyrantothecinemaassoonashisfatherwentout.（父亲一出门，小男孩就跑向电影院。）②whenever：“每当，任何时候”，等于everytime。例：Helikeslisteningtomusicwheneverhehastime.（每当他有时间的时候，他喜欢听音乐。）巩固提高练习1.—Mum,whencanwegotowatchthevolleyballmatchinthesportscenter?—Notuntilthehomework______tomorrow.A.willbefinished

B.isfinished

C.wasfinished

D.hasfinished2.—Canyoutellmewhenyouaregoingtoarrivethere?—I'mnotsure.ButI'llringyouupassoonasI_____theretomorrow.A.arrive

B.arrived

C.willarrive

D.amgoingtoarrive3.Timewaitsfornoman.Butsomepeoplewon'trealizetheimportanceoftime______it'sgone.A.until

B.as

C.when

D.since4.—Whenwillthemeetingend?

—______.A.Notuntiltheagreementisreached.

B.UntiltheagreementisreachedC.Nottilltheagreementisreached.

D.Tilltheagreementisreached.5．—MayIborrowanothertwobooks,Madam?—Sorry.Nomorebookscanbeborroweduntilthesetwo______.A.return

B.arereturned

C.willreturn

D.willbereturned6.—Hey,Tony,______willthepetitionstart?Ican'twaittowatch.—______thefamousscientistarriveshere.When;NotuntilB.When;UntilC.Howlong;UntilD.Howlong;Notuntil7.—BecauseoftheDoubleReductionPolicy(双减政策),studentsgohome______theyfinishtheirhomeworkatschool.—Sure.AsaparentofaGrade9student,Idon'tfeelsotiredasbefore.A.before

B.while

C.since

D.after8.______youusetheputer,youcansearchforlotsofinformationquickly.A.Assoonas

B.Before

C.Since

D.After9.—Katewasonceoverweight.Icouldn'tbelieveshebecamesoslim______lsawherjustnow.A.until

B.since

C.if

D.when10.—Whatadullrainydayagain!Whenwilltherainstop?—______nextSaturday.Theweatherforecastsaysitwilllastawholeweek.A.Until

B.Before

C.After

D.Notuntil11.Peopledon'tknowthevalueoftheirhealth______

theyloseit.A.when

B.as

C.after

D.until12.—Wewonderifshe______

therightwaythenearestpostoffice.—

Iwillcheckitassoonasshe______.willfind,willreturn

B.willfind,returns

C.finds,willreturn

D.finds，returns13．—______didyougotobedlastnight?—______

Mothermycameback.Howlong;Notuntil

B.Howlong;Until

C.When;Notuntil

D.When;Until14.Susan,doyourhomeworkquickly.We'llgoforapicnicassoonasyourhomework______.A.finishes

B.willfinish

C.isfinished

D.willbefinished15.—Mum,canIplaythegameWarcraftnow?—Notuntilyourhomework______·A.willfinish

B.willbefinished

C.isfinished

D.finishes16.Loveyourparents______theyarealive.Don'twaituntilitistoolate.A.because

B.before

C.while

D.unless17.Mr.Blackwalkedaroundandofferedhelp______weweredoinganexperiment.A.while

B.before

C.after

D.until18.Timewaitsfornoman.Butsomepeoplewon'trealizetheimportanceoftime______it'sgone.A.as

B.after

C.when

D.until19.—Mayweleavetheclassroomnow?—No,you______.You______toleaveuntilthebellrings.mustn't;areallowed

B.can't;aren'tsupposedC.needn't;aren'tallowed

D.don'thaveto;aresupposed20.Peterwasgoingtoschool______itbegantorain,sohehadtoweararaincoat.A.since

B.when

C.while

D.because21.Mycousinwilltellmeabouthistripafterhe______hometomorrow.A.arriving

B.willarrive

C.arrives

D.isarriving22．—Couldyouhelpmelookaftermybaby______Iamaway?—______.as;WithpleasureB.while;MypleasureC.as;That'sallrightD.while;Withpleasure23.Herealizedhismistakesandtookactiontoreducetheloss______itwastoolate.A.before

B.unless

C.if

D.until24.Thegameshowwassofunnythathewatcheditforhours______sherealizedit.A.as

B.since

C.before

D.after25.—Excuseme.Whencanwehavethesteakweordered?—Notuntilit_____intenminutes.A.willbeprepared

B.isprepared

C.hasprepared

D.wasprepared26.—Excuseme,couldyoucallmewhenmyfriend______here?—Ofcourse.ButIamstillnotsurewhenyourfriend______here.A.es;wille

B.es;esC.wille;es

D.wille;wille27.—Whenwilltherainstop?—______nextFriday.Theradiosaysitwilllastforaweek.A.Until

B.Before

C.After

D．Notuntil28.Peopledidn'tknowAnneFrank'sdiary______itwascollectedandpublishedbyherfather.A.after

B.until

C.when

D.assoonas29.—Yourpictureissowonderful.—

Ihadworkedfor10hours______Ifinisheddrawingit.A.until

B.after

C.since

D.before30.Ididn'tbelieveit______lsawthe______endingonthewebsite.A.until;surprisingB.if;surprise

C.that;surprised

D.what;surprise31.—Excuseme,Mum.Whencanwehavedinner?—Notuntilit______inhalfanhour.A.isprepared

B.hasbeenpreparedC.willbeprepared

D.wasprepared32.MyEnglishwaspoorbecauseIhadn'tlearnedit______lcamehere.A.assoonas

B.after

C.before

D.whenever33.—______didyouleavetheclassroom?—______Isawmydaughtersitdownandreadherbook.A.Howlong;After

B.When;AfterC.Howlong;Until

D.WhenUntil34.—Oh,somanypeoplearestandingoutsidethehall.______willthefilmstart?—______seveno'clock.A.Howsoon;Notuntil

B.Howlong;NotuntilC.Howsoon;Until

D.Howlong;Until35.______hegotreadytoleavehome,hisparentscametohishome.A.While

B.As

C.Until

D.If36.—MyfatherworksinChengdu.Ittakeshimmuchtimetogohomeeverymonth.—Don'tworry.It'llbeeasierandquickerafterTaizhouHighSpeedRailStation______.A.builds

B.isbuilt

C.willbuild

D.willbebuilt37.—______willwetakeoffourmasksinclass?—______wecanfindoutmedicinetocurethediseasepletely.A.Howlong;Notuntil

B.Howsoon;NotuntilC.Howlong;Until

D.Howsoon;Until38.Maxgotlostandwastrappedintheforestfor10hours______afarmernearbyfoundhim.A.if

B.since

C.until

D.after39.MyparentsgaveredpacketstomycousineverySpringFestival______shegotajob,becauseshesaidshewasabl