状语从句一什么是状语从句二状语从句位置三状语从句分类四特殊句式五状语从句常见考点六练一练一什么是状语从句状语从句是行使状语功能的从句，因为其作用相当于副词，它可以用来修饰谓语、定语、状语或整个句子。状语从句通常由一个连接词或起连接词作用的词组引导。二状语从句位置比较灵活，有时可以放于句首，有时可以置于句末。状语从句位于句首时，其后常用逗号与后面的句子隔开。三状语从句分类状语分类常用连接词例句时间状语after,before,when,while,whenever,assoonas,themoment,as,since,until,theminute,thesecond,immediately,directly,instantlyTheballgoesupveryhighafterithitstheground.Waituntilyou’recalled.地点状语where,whereverYoucantakeawalkwhereveryouliketo.原因状语Because,as,since,nowthat,seeing(that)considering(that),Sinceyoudonotunderstand,Iwillexplainagain.结果状语sothat,suchthatHeissoyoungthathecan’tgotowork.目的状语sothat,inorderthatSpeakclearlysothattheymayunderstandyou.条件状语if，unless,as(so)longas,once,unless,onconditionthat，incaseHewilldoanythingaslongasitisinteresting.让步状语though,although,eventhough,whilewhether，whoever/nomatterwho，whatever/nomatterwhat，whenever/nomatterEventhoughyousayso,Idonotbelieveit.比较状语thanas⋯as，themore⋯themoreThemoreIseehim,thelessIlikehim.方式状语as,asif,asthoughHetoldmeeverythingasifIwerehisbestfriend.四特殊句式时间状语中A:It+be+时间点+when⋯⋯当某事发生时是什么时候Itwas11:00PMwhenhecamebacklastnight.B:Itis/hasbeen+时间段+since⋯⋯自从某事发生后已过了多久时间Itis/hasbeentwoyearssinceIenteredthetheseniorschool.C:It+be+时间段+before⋯⋯在某事发生之前需要多久时间Itwas8yearsbeforewefinallydroveawaytheJapaneseinvaders.ItmightbealongtimebeforeChineselandonthemoon.让步状语从句A:as引导的让步状语从句，从句的表语、状语必须前置到句首。Shortasheis,heplaysbasketballverywell.Childasheis,heisknowledgeable.（开头0冠词的用法）12MuchasIrespecthim,Icannotagreewithhim.B:though引导的让步状语从句，可以倒装，也可以倒装。C:其他词引导的都不能倒装。状语从句的省略现象当主从主语一致，且从句谓语中含有be动词，此时，可以省略从句的主语和be动词A:Shealwayssingswhile(sheis)doingherhomework.B:Once(itis)seen,itcanneverbeforgotten.C:Though(itwas)cold,hestillworeashirt.条件状语从句A:真实条件状语：条件是事实或者在讲话人看来所提出的假设完全可以成为现实--->谓语用陈述语气Ⅰ从句中的条件是前提，主句中的情境能否实现，取决于条件能否实现。在这种条件状语从句，动词不能用将来时态，而用一般现在时代替将来时，用现在完成时代替将来完成时Ifyoutrustbeforeyoutry,youmayrepent(后悔)beforeyoudie.Ifwecatchthe10o’clocktrain,wemaygettherebylunchtime.Ⅱ主句用祈使句，表示讲话人的请求或提议Ifyouwishforpeace,bepreparedforwar.Ⅲ当从句表示到将来某个时刻已经完成或正在进行的动作时，动词可用现在完成时或现在进行时。IwillreturnthebookonMondayifIhavefinishedit.Thepolicewon’ttakeyourcarawayifyouaresittinginit.34Ⅳ表示习惯性动作、科学真理或客观事实，主从句中的动词时态或所使用的情态动词通常一致。Ifyoupouroilonwater,itfloats.如果我们把红色和黄色混合起来，我们就得到了橘色。B:非真实条件状语：指的是所提出的假设实现的可能性极小或与事实相反，谓语动词用虚拟语气。Ⅰ与现在事实相反：从句谓语动词：v-ed/were主句谓语动词：would/could/might/should+v.例句：Ifsheworkedmoreslowly,shewouldnotmakesomanymistakes.Ishouldn'tgothereifIwereyou.Ⅱ与过去事实相反：从句谓语动词：haddone主句谓语动词：would/could/might/should+havedone例句：IfIhadrealizedthathewasill,Ishouldhaveofferedtohelphim.Ifanythinghadhappened,hewouldhaveletherknow.Ⅲ与将来事实...
