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1、状语从句（课件）儋州市第二中学蔡小卫状语从句在复合句中作状语，修饰主句的动词、形容词、或副词等。状语从句放在主句之前时，常用逗号隔开；放在主句之后一般不用逗号。状语从句按其意义和作用可分为时间、条件、原因、让步、目的、结果、方式、比较、地点等9种。一、时间状语从句常用连词有when,as,while,before,after,since,till(until),assoonas,hardly…when,nosooner…than,themoment等1、主句是将来时，时间状语从句要用一般现在时表将来。IwillgoonwiththeworkwhenI___backtomorr
2、ow.A.willcomeB.amgoingtocomeC.comeD.shallcome2、when/while/as都表示“当......时候”，when从句的动作和主句的动作可以同时发生，也可先后发生。when从句的谓语动词可是延续性动词，也可是终止性动词;as/while则强调主从句的动作同时发生。其谓语动词应是延续性动词。Iwasreading____hecamein.(A.whileB.whenC.asD.)____IwaswatchingTV,shecamein.(A.WhileB.WhenC.AsD.)___shewalkedalongthestreet,
3、shesanghappily.(A.WhileB.WhenC.AsD.)常考句型：beabouttodo…whenIwasabouttogoout____itbegantorain.(A.WhileB.WhenC.AsD.assoonas)3、till(until)“直到…为止”；not…until“直到…才”常考句型：Itwasnotuntil…that（强调句）Notuntil…助动词/情态动词+主语+谓语（倒装句）Notuntil____me____Iwaswrong.(A.hetold;IrealizedB.didhetell;IrealizedC.didhetel
4、l;didIrealizeD.hetold;didIrealize)思考：以上句子如何改为强调句？5ItwasnotuntilhetoldmethatIrealizedIwaswrong.4、表示“一…就…”可用assoonas，themoment,nosooner…than,hardly…when等句型，但后两者必须用倒装句。Nosooner/Hardly+had+主语+v-ed…than/when+主语+谓语（过去时）___theroom____Iheardaloudnoise.A.HardlyIhadentered;whenB.NosoonerIhadentered;t
5、hanC.HardlydidIenter;thanDNosoonerhadIentered;than5、名词词组theinstant/themoment/thefirsttime/everytime或副词immediately都可以引导状语从句。Theinstanttheresultcameout,shetoldme.高考模拟：Ithoughthimeasytotalkwith___Isawhim(A.forthefirsttimeB.thefirsttimeC.AtthefirsttimeD.onthefirsttime)二、地点状语从句常由where,wherever,e
6、verywhere等连接词引导。_____yougo,youshoulddoyourworkwell.(A.HoweverB.WhereverC.NomatterhowD.Whomever)三、条件状语从句：由if/unless/once/incase/aslongas/providing(provided)that等引导。注意：主句表示将来，条件句只能用一般时态。高考模拟:Hewillgoonholidaywithhisumbrella___he___it.(A.if;needsB.incase;needsC.Unless；willneedD.incase;willneed
7、)由providing(provided)that（“假如”）引导的条件句的用法：Providing/Provided(that)weallowhim,hewouldcertainlycomeforthesummervacation.四、原因状语从句：引导词为because,as,since,for等1、because表示原因的语气最强，引导的从句可放在主句前或后，回答why的问句一定要用becauseHehadtostayathomeyesterday______hewasill.2、since表示双
