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状语从句状语从句是一个有主谓结构的完整句子在主句中修饰动词或整个句子充当状语的从句，可表示时间、地点、原因、目的、结果、条件、让步、方式和比较等。高考的重点是：时间、让步、地点、条件和目的状语从句。其特点是：从属连词有一定的意义，根据主句和从句的逻辑关系来确定连词。Takeanumbrella____itrains.A.unlessB.incaseC.ThoughD.afterB•一、时间状语从句•常用的连词有：when,as,while,whenever,after,before,not…until(till),since,once,as…as,themoment(minute),bythetime,nosooner…than,hardly…when,everytime(nexttime),•1.whenwhileas•有几种情况要用when•bedoingsth…..when•bejustabouttodo….when•haddone…when•hardly/scarcely….when•beonthepointofdoingsth….when•while从句中常用进行时态或表状态延续的动词，用while时也可用when代替。•Hephonedmewhile(when)Iwashavinglunch.•as表示主句和从句的谓语动词动作同时发生,表”随…而发生”时只用as.•Hesangasheworked.•Astimegoesby,webecomemature.(“with”isapreposition,wecansay:Withtimegoingby,webecomemature.)•2.before•由before引导的一个句型:Itis/willbe+一段时间+before从句（从句中用一般现在时或一般过去时）•Itis(willbe)fivedaysbeforehecomeshere.•Itwas/mightbeafewdaysbeforehecamebacktolife.•3.not…until(till)•如果前面的谓语动词是延续性动词就不用否定not，till不放在句首。•Iwillstayhereuntilyoucomeback.•Iwillnotleaveuntilyoucomeback.•高考考点：•NotuntilyoucomebackwillIleave.•ItisnotuntilyoucomebackthatIwillleave.•4.since•since所连接的状语从句中常用一般过去时，主句用现在完成时。•Theyhavelivedheresincetheymovedhere.•现在完成时也有句型：•Ihavetaughtherefortenyears.（可转换为Itis(hasbeen)tenyearssinceIbegantoteach.)•这句的形式为：Itis/hasbeen+一段时间+since从句（从句中用一般过去时）。注意before与比较。下面两句的意思一样吗？•翻译：Itissixyearssincehecamehere.•Itissixyearssincehelivedhere.•5.assoonas•表示“一…就”；表这个意义还可用：themoment(minute),directly,immediately,instantly,hardly…when,nosooner…than,•IwilltellherthenewsassoonasIseeher.•Shereturnedthebookthemomentshefinishedreadingit.•Theworkerswenthomeimmediatelytheyfinishedtheirwork.•有时还可用everytime,eachtime,nexttime,thefirsttime等连接时间状语从句。•Maketherightchoices:•1.Theyfellinlovewitheachother____theymeteachother.•A.forthefirsttimeB.atthefirsttime•C.thefirsttimeD.atnotime•2.Itbegantorain____hegothome.•A.theminuteB.inaminute•C.foraminuteD.atthemoment•二、原因状语从句•从属连词常有：because,since,as,nowthat,inthat(for是并列连词，补充说明原因。）CA•because语气最强,常回答why的提问；我们用since,as表示已知的或明显的原因；inthat意思为“原因在于”,for放在另一个句子之后用逗号隔开，补充说明前一句的原因,连接的是并列句。because不与so连用。•---Whydidn’thefeeldisappointed?•---Becausehedidn’tgettheposition?•Sinceitisraining,I’llnotgoout.•Nowthatyoumentionit,Idoremember.•IwasluckyinthatIwasabletofindagoodjob.•Igotacold,forIhadbeenwalkingintherain.•三、地点状语从句•地点状语从句常用连词where,wherever来引导。状语从句要根据句子注意体会。•Wherethereisariver,thereisacity.•Makeamarkwhereyouhaveaquestion.•Sitwhereveryoulike.•四、目的状语从句•目的状语从句用连词sothat,inorderthat,incase来连接，从句中常有情态动词may(might),can(could)。•Speakclearly,sothattheymayunderstandyou.(Speakclearlysoastounderstandyou.)•Shehasboughtthebookinorderthatshecouldfollowthelessons.(Shehasboughtthebookinordertofollowthelessons.)•Heleftearlyincaseheshouldmissthetrain.•五、结果状语从...