4.初中语法状语从句

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1、英语语法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whenTheboycriedwhenhesawhismother.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

2、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.whenC.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：Walktillyoucometoawhit

3、ehouse.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.marriedB.didn'tgetmarriedC.wasnotmarryingD.wouldmarry真题演

4、练（2006上海）A dozen ideas were considered ____thearchitect decided on the design of the building.A. becauseB. beforeC. whetherD. 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：IhavelivedinB

5、eijingsinceIworkedinShanghai.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.since1.逻辑推理：没有……已经很长时间了2.Itbesince+延续性动词选DThey___friendssincetheymetinShanghai.A.havemadeB.havebecomeC.havebeenD.haveturned1.s

6、ince+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

7、’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）Smal