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1、必修二语法时间状语从句whenwhileaswhen:时间点，时间段（从句可以跟延续性动词和非延续性动词）Ijumpedupwhenshecalled.while:时间段（从句跟延续性动词）WhileIwaswaitingatthebusstop,threebuseswentbyintheoppositedirection.as:时间点，时间段。(强调主从句动作同时发生，“一边….,一边…”)Asthedaywenton,theweathergotbetter.1．填空：1）________Iwaswaitin
2、gfortheresult,Ifeltveryanxious.2）Thereweresomechairsleftover_____everyonehadsatdown.3）_________economydevelops,Chinawillbeapowerfulcountry.4）________allofthemarestrongcandidates,onlyonewillbechosenforthepost.5）Iearnonly120dollarsaweek,_______sheearns180dollars
3、.6）OneFriday,wewerepackingtoleaveforaweekendaway______mydaughterheardcriesforhelp.7）Shehadjustfinishedherhomework_______hermotheraskedhertopracticeplayingthepianoyesterday.8）Iwasabouttogoout_______someonecalledme.9）Whydidyoutakeataxi______youcouldhavewalkedthe
4、re2．练习：1）Becauseoftheheavytraffic,itwasalreadytimeforlunchbreak_______shegottoheroffice.A.sinceB.thatC.whenD.until2)---DidyoureturnthebooktoTim?---Yes,Igaveittohim_______Isawhim.A.whileB.themomentC.suddenlyD.once3)Marymadecoffee________herguestswerefinishingth
5、eirmeal.A.sothatB.althoughC.whileD.asif4)Peterthinksitwon’tbelong_______heisreadyforhisnewjob.A.whenB.afterC.beforeD.since5)Thisfoodiscomforting,________theseasonis.A.wheneverB.howeverC.whereverD.whatever6)We’dbettertakehimtohospital________itistoolate.A.after
6、B.untilC.beforeD.when7)You’llhavetowaitforonemoreweek_______themanagercomesbackfromhertrip.A.afterB.untilC.whenD.before8)Anumberofhighbuildingshavearisen_______therewasnothingayearagobutruins.A.whenB.whereC.beforeD.until原因状语从句because表示直接的原因，用来回答why,注意同becauseo
7、f的区别since,as,一般可通用，表示明显的原因，翻译成“既然”“由于”，一般放句首，同nowthatfor引导并列句，补充或推断，不能放在句首1.填空7Theplanewasdelayed______thefogwasthick._______youhavenolicense,youarenotallowedtodrive.It’sdaybreak,_____thebirdsaresinging.Hemustbeathome,______thelightsareon.Thefootballmatchwaspu
8、toff_______therain.2.练习：1）---Haveyouaskedadayoffschool,Tom?---No,Ihaven’t_______Iwanttogotoschooltoday.Ifeelbetternow.A.thoughB.onceC.unlessD.because2)Amancannotsmilelikeachild,___
