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1、初三英语专题复习之状语从句何为状语从句?状语从句类型:时间、地点、原因、目的、结果、条件、方式、让步、比较状语从句九类。Iloveyou.Iloveyouverymuch.Iloveyoutilltheendoftheworld.IfellinlovewithyouwhenIsawyouatfirstsight.时间状语从句引导时间状语从句的连接词:when,as,while,after,before,since,assoonas,till,until等。eg:Whatareyougoingtodowhenyougrowup?遵循主将从现/主情从现/主祈从现原则when/while/as
2、的区别(1)when可延续,可非延as/while只跟延续性动词eg:Itwassnowingwhenwegottotheairport.Pleasewritewhile/asIread.(2)when可先后,可同时as/while只同时eg:Hewenthomewhenhehadfinishedhishomework.Somestudentswerereadingwhileotherswerewriting.(2)before,after表示主句的动作发生在从句的动作之前或之后.eg:Pleaseturnoffthelightbeforeyouleavetheroom.Youcanwa
3、tchTVafteryoufinishhomework.(3)until/till表示主句的谓语动词(延续性动词)一直延续到until/till所表示的时间为止。eg:Youmaystayhereuntil/tilltherainstops.Hedidn’tgotobeduntilhehadfinishedhiswork.Untilhejoinedthearmy,heworkedinthatfactory.until/till的用法区别:注意:1.肯定句中,二者可以通用。2.否定句中,表示主句的谓语动词(非延续性动词)直到until所表示的时间才发生。构成句式not...until…3.
4、till不用于句首,也不可用于强调句。(4)since表示“自…以来”,主句用现在完成时,从句用一般过去时。eg:IhaveworkedinthiscompanysinceIgraduatedfromcollege.注意:It’s+一段时间+since+从句自从……已经……eg:It’stenyearssinceIleftcollege.(5)assoonas表示“一…就…”。eg:Assoonashearrives,I’lltellhim.主将从现原则地点状语从句由where,wherever引导。eg:Wherethereisawill,thereisaway.Whereveryou
5、go,Iwillgowithyou.原因状语从句常用连词because,since,for和as引导because回答why提出的问题since,as表示既然,由于for表示附加理由或推断说明eg:Ilenthimmybikebecauseheneededit.Let’sbeginourmeetingsince/aseverybodyishere.Thedaysarelongerforit’sspringnow.目的状语从句引导词或词组:sothat,so,inorderthat,soasthat等,谓语含有may,might,can,could,will,would等情态动词。eg:H
6、emustgetupearlysothathecancatchthefirstbus.当从句与主句主语一致时,可用soasto,inorderto.eg:Heworkeddayandnightinorderthathecouldsucceed.=Heworkeddayandnightinordertosucceed.结果状语从句引导结果状语从句的词或词组有:so,sothat,so…that,such…thateg:ThequestionissohardthatIcan’tworkitout.=Thequestionis____hardforme____workitout.=Theque
7、stionis____easy______forme___workitout.tootonotenoughto条件状语从句引导词:if,unless,aslongas(只要,如果,由于)主祈从现、主将从现、主情从现除非你努力学习,否则你将不能通过考试。eg:Youwillnotpasstheexamyoustudyhard.=__youdon’tstudyhard,youwon’tpasstheexam.=Studyhard,___