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1、第八讲状语从句一 定义：A状语主要是用来修饰动词和形容词的，以表明动作发生或状态存在的时间，地点，原因，等。 1．Tenyearsago,ShebegantoliveinDalian. 时间状语修饰began2．Theboywaspraisedforhisbravery. 原因状语修饰waspraised B状语从句就是用一个句子来代替上面的时间状语和原因状语。 1.Tenyearsago,shebegantoliveinDalian. Whenshewas12yearsold,shebegantoliveinDalian. 2.Theboywaspraisedforhisbr
2、avery. Theboywaspraisedbecausehesavedthebaby’slifeinthefreezingriver.二 状语从句的种类：A时间状语从句:连接时间状语从句的连接词有:(1)连词：when,while,as.它们都表示当…时候的意思。如果主句和从句的动作同时发生且都是进行时态，只用while,as.其他情况下when,while,as通用。1.Whenhecamein,Iwaslisteningtotheradio．2.AsIwaswanderinginthestreet,Imether.3.While(as)IwaswatchingTV,mymu
3、mwascookinginthekitchen.(2)连词before,after,since,until(till).当他们表示时间时，他们既是介词又是连词。{Heusuallydrinksacupofteabeforehegoestoschool. 连词Heusuallydrinksacupofteabeforegoingtoschool. 介词{Heusuallydrinksacupofcoffeeafterhecomesbackfromschool. 连词Heusuallydri
4、nksacupofcoffeeaftercomingbackfromschool. 介词{IhavelivedinDaliansincemysonwasbornin1999. 连词通常情况下，主句用现在完成时，从句用一般过去时。IhavelivedinDaliansince1999. 介词{Iwillwaithereuntil(till)youfinishyourjob. 连词Iwillwaithereuntil(till)8pm. 介词(3)词组：assoona
5、s{Iwilltellhimassoonashecomesback.Assoonasshefinishesherhomework,shewillplaytennis.通常情况下，主句用一般将来时，assoonas引导的从句用一般现在时。B地点状语从句： 连接地点状语从句的连接词有：where,wherever 1.Wherethereiswater,thereislife. 2.Wherethereisawill,thereisaway. 3.Whereveryougo,Iwillfollowyou.==Nomatterwhereyougo,Iwillfollowyou.
6、4.IwillgowhereverIcanfindagoodjob.==IwillgonomatterwhereIcanfindagoodjob.C原因状语从句：连接原因状语从句的连接词有：because,as,since,for.1.Tomwaslateforschoolthismorningbecausehedidn’tcatchtheearlybus.2.Icouldn’tgotoBeijingonbusinessasmymotherwasill.3.Sinceallofusagreedaboutthisplan,wewillcarryitoutnextweek.4.Welis
7、tenedcarefully,forthespeechwasveryimportant.注意：当连接原因状语从句时，because语气最强，as,since,for次之；because,as,since引导的从句可在主句前面或后面，for引导的从句只能在主句的后面。D条件状语从句：连接条件状语从句的连接词有：if,unless,aslongas.1.IfIamnotbusytomorrow,Iwillplayfootballwithyou.2.Youwon
