英语语法英语语法状语从句状语从句状语从句的分类1.时间状语从句•按照引导词分类：•When,while,as：当……时，在……的同时•When/As/Whilehewaseatinghisbreakfast,heheardthedoorbell.•Since：自……以来•IthasbeentwoyearssinceIcametoBeijing.•从句动词为非延续性动词when•Theboycriedwhenhesawhismother.•从句动词为延续性动词while,as,when均可•while强调“在……的同时”•as强调“伴随”的状态•TomfellasleepwhileJerrywasgivingalecture辨析：when/while/as时间状语从句的破题方法真题演练•（2007上海）Hetransplantedthelittletreetothegarden____itwasthebesttimeforit.•A.whereB.when•C.thatD.until扩展练习•（2008上海）•—AreyoureadyforSpain?•—Yes.Iwantthegirlstoexperiencethat____theyareyoung.•A.whileB.untilC.ifD.before•其他引导词：•（1）until/till•延续性动词+肯定语气：到……为止•例：Walktillyoucometoawhitehouse.•非延续性动词+否定语气：到……才开始•例：Wedidn’tbeginourdiscussionuntilhecameback.真题演练•（2003上海）Agoodstorytellermustbeabletoholdhislisteners’curiosity_______hereachestheendofthestory.•A.whenB.unlessC.afterD.until扩展练习•（2000上海）Myuncle___untilhewasforty-five.•A.married•B.didn'tgetmarried•C.wasnotmarrying•D.wouldmarry真题演练•（2006上海）Adozenideaswereconsidered____the•architectdecidedonthedesignofthebuilding.•A.because•B.before•C.whether•D.unless辨析：两种since的句型•（1）Itbetimesince+非延续性动词•例：TheyhavebeenfriendssincetheymetforthefirsttimeinLondon.•解释：主句的动作从since的那一刻持续到现在（有……已经很长时间了）•（2）Itbetimesince+延续性动词•例：IhavelivedinBeijingsinceIworkedinShanghai.•解释：主句的动作从since引导的从句中的持续性动作结束时持续到现在（没有……已经很长时间了）扩展练习•Thatwasreallyasplendidevening.It’sbeenyears____Ienjoyedmyselfsomuch.•A.whenB.thatC.beforeD.since•1.逻辑推理：没有……已经很长时间了•2.Itbesince+延续性动词选D•They___friendssincetheymetinShanghai.•A.havemadeB.havebecome•C.havebeenD.haveturned•1.since+非延续性动词主句的动作延续至今•2.选择四个选项中的延续性动词选C2.条件状语从句•逻辑关系：假设•引导词：•（1）假如：if,unless(ifnot)•例：Youwillnotpasstheexamunlessyouworkhard（你不会通过考试，除非你努力学习）•=Youwillnotpasstheexamifyoudon’tworkhard（如果你努力学习，你就会通过考试）•（2）在……条件下：incase,onconditionthat,provided(that),supposing,suppose(that),aslongas•例:•ProvidingIgetmyfather’spermission,I’llgo!•（只要得到父亲的同意，我就去）条件状语从句题的破题方法•1.读题，确认从句和主句•2.分析从句和主句之间的逻辑关系（正面条件/反面条件）•3.根据逻辑关系选择合适的引导词•正面条件：if,incase,onconditionthat,providing(that),supposing,suppose(that),aslongas•反面条件：ifnot,unless正面条件真题演练•（2007上海）Smallsailboatscaneasilyturnoverinthewater_____theyarenotmanagedcarefully.•A.though•B.before•C.until•D.if反面条件扩展练习•（2007上海春季）____thereisasnowstormorsomeotherbadweather,themailalwayscomesontime.•A.BecauseB.If•C.WhenD.UnlessWrapUp3.让步状语从句让步状语从句题的破题方法真题演练•（2006上海春季）_____mostoftheearth’ssurfaceiscoveredbywater,freshwaterisveryrareandprecious.•A.As•B.Once•C.If•D.Although扩展练习•（2008上海春季）_____thisisonlyasmalltown,it’scrowdedwithtouristswhocomehereallyearround.•A.SinceB.UnlessC.OnceD.Although表示“无论”的让步状语从句真题演练•（2008上海）______wellpreparedyouare,youstillneedalotofluckinmountainclimbing.•A.HoweverB.Wh...
