第二部分语法考点突破第十讲状语从句一、状语从句的分类项目连接词、关系词或引导词例句注意事项时间状语从句when,while,as,before,after,since,until,themoment等。①WhenIwaswalkingalongthestreet,Imetafriendofmine.②Ididn’tgotobeduntil10o’clocklastnight.③Iwilltellhimthenewsthemomenthecomes.要注意时态一致,一般情况下,在时间状语从句中,表示将来的动作用一般现在时(不可用将来时)。项目连接词、关系词或引导词例句注意事项地点状语从句where,wherever①Wherethereisawill,thereisaway.②Wearealwayswelcomewhereverwego.注意不要和where引导的定语从句混淆,若是定语从句,where前必然有先行词。项目连接词、关系词或引导词例句注意事项条件状语从句if,unless,as(so)longas,onconditionthat,inca-se等。①Youshouldgotoschoolunlessyouareseriouslyill.②Hewillcertainlypasstheexamnextte-rmifheworkshardathislessons.条件状语从句和时间状语从句一样,当主句是将来时的时候,从句要用一般现在时。项目连接词、关系词或引导词例句注意事项原因状语从句because,as,si-nce,for,nowthat①Hedidn’tgotoschoolbe-causehewasill.②Itmusthaverainedlastni-ght,forthegr-oundiswet.③AsheisaLeaguememb-er,hetakestheleadinverythinginhisclass.1.because语气最强,用来说明人所不知的原因,回答why提出的问题;since次之,as最弱。2.as引导的从句往往放在主句前面,用来说明比较明显的原因;for用作连词时,往往表示一种附带的解释、说明或推理。项目连接词、关系词或引导词例句注意事项让步状语从句though,alth-ough,evenif/though,as,whatever,however,whoever,nomatterwhat①Althoughheisachild,heknowsalot.②Iwillgoandattendthemee-tinghoweverbusyIam.③Tiredas/thoughIwas,Iwentonwithmywork.1.当有though,although时,后面的从句不能有but。2.as/though引导的让步从句必须把表语或状语提前。项目连接词、关系词或引导词例句注意事项结果状语从句so...that...,such...that...,sothat(结果以致)①Herunssofastthatnoonecancatchupwithhim.②ItwassuchaninterestingnovelthatIreaditthreetimes.③IgotuplatesothatImis-sedtheearlybus.在so...that...和such...that...所引导的结果状语从句中,so为副词,后面跟形容词、副词或分词,而such为形容词,后面只能跟名词或名词性短词。项目连接词、关系词或引导词例句注意事项方式状语从句as,justas,asif,asthough①Weshouldworkandstu-dyashedid.②Theytalkedasiftheyhadbeenfriendsforyears.asif,asthough在方式状语从句中多指非真实的或可能性较小的情况,常用虚拟语气。项目连接词、关系词或引导词例句注意事项比较状语从句as...as...,notso...as,more...than①Heworksashardaseveryoneelseintheclass.②Heistallerthananyotherstudentinourschool.可以用比较句型表示在一定范围内的最高级含义:比较级+than+anyother+单数可数名词。二、两组重要连词的用法区别从句连词区别示例时间状语从句when表示某个具体的时间,可以指一段时间,也可以指一点时间,既可表示一时性的动作,又可表示持续的动作。有时强调突然发生,出乎预料。①WhenyouarriveinLondon,pleasegiveusacall.②Whenhewashavinghisbreakfast,heheardthedoorbellring.③Iwasjustcomingalongtoseeyouwh-enIranintoWilson.从句连词区别示例时间状语从句as表示的动作与主句动作同时发生,具有延续的含义,一般与延续性动词连用。①Astimewenton,hegrewmoreandmoreimpatient.②Aswewalked,wetalked.while只表示持续性的动作或状态,不能表示一时性或短暂的动作。Whileshewasread-inganovel,hermo-therwascookingthedinner.从句连词区别示例原因状语从句because表示原因的语气最强,常用于回答以疑问词why引导的疑问句。because从句一般位于主句后面。①Theenginestop-pedrunningbecausethefuelwasfinished.②Heisabsenttodaybecauseheisill.从句连词区别示例原因状语从句for表示一种推理或解释,或用作附加说明,而不是指理由或原因,语气最弱,一般不在句首,意为“因为,其理由是”。①Thedaybreaks,forthebirdsaresing-ing.②Theremustbenooneinthehouseforthedoorisclosed.从句连词区别示例原因状语从句as表示十分明显的原因,说明一般的因果关系,着重点在主句。as通常放在主句前,有时也可改用so引导的分句。Asitissnowing,weshallnotgotothepark.=Itissnowing,soweshallnotgotothepark.从句连词区别示例原因状语从句sincesince表示对方已知的、无需加以说明的、既成事实的理由,意为“既然”,其引导的从句常放在句首。①Sincehecan’tanswerthequestion,youmayasksomeoneelse.②Sinceyouarefreetoday,youhadbetterhelpmewithmymathematics.