1状语从句在复合句中,修饰主句中的动词、形容词或副词等的从句叫状语从句。状语从句根据它表达的意思可分为时间、地点、原因、目的、结果、让步、比较(或方式)和条件等类。1.时间状语从句2.引导连词有when,while,till,not…until,since,after,before,assoonasThebuswon’tstartuntileverybodygetson.公共汽车直到每人都上车为止,才开动。WhenheknockedatthedoorIwascooking.当他敲门时,我正在煮饭。Lastnightbeforehecamebackhome,hiswifehadalreadycookeddinnerandwaitedfor2hours.昨天晚上在他回到家之前,他的妻子已经做好晚饭足足等了他两小时之久。AfterIwenttochurch,Iwentshopping.2.地点状语从句地点状语从句通常由where,wherever引导。Wherethereisawill,thereisaway.哪里有志向,哪里就有出路。有志者事竟成。Wherethereisalife,thereisahope.哪里有生命,哪里就有希望。留得青山在,不怕没柴烧。Whereveryougo,whateveryoudo,Iwillberightherewaitingforyou.不管你去哪里,不管你做什么,我都会在此守侯你。3.原因状语从句引导连词有because,as,since。Hedidn′tseethefilmbecausehehadseenit.他没有看那部电影,因为他已经看过了。Theycouldn’tgetonthetrain,foritwastoocrowed.比较:because,since,as和for1)because语势最强,用来说明人所不知的原因,回答why提出的问题。当原因是显而易见的或已为人们所知,就用as或since。Ididn'tgo,becauseIwasafraid.Since/Astheweatherissobad,wehavetodelayourjourney.2)由because引导的从句如果放在句末,且前面有逗号,则可以用for来代替。但如果不是说明直接原因,而是多种情况加以推断,就只能用for。Heisabsenttoday,because/forheisill.Hemustbeill,forheisabsenttoday.注意because不能和so连用。4.目的状语从句引导连词有that,sothat…,inorderthat。Hemustgetupearlysothathecancatchthefirstbus.他必须早起,以便能赶上第一辆公共汽车。Herepaintedthehousesothathecouldwelcometheguests.MillionsoftreesareplantedinNorthChinasothatthesandcanbestoppedfrommovingsouth.Themotherleftworkearlierinorderthatshecouldbeathomewhenthechildrenarrived.Sothat…——以便/以致……例如:(1)Theystudiedhardsothattheycouldpasstheexam.(2)Theystartedearlysothattheycaughttheearlybus.注意点:在例句(1)中,是引导目的状语;在例句(2)中,是引导结果状语。一般来讲,从句中含有情态动词的,为目的状语。无情态动词的,为结果状语。5.结果状语从句引导连词有that,so…that…,such….thatTheboxissoheavythatIcan’tliftit.这个盒子如此沉,以致我无法抬起来。such+名词性词组+that…So+形容词/副词+that…——如此……以致……例如:(1)Sheissuchagoodteacherthatweallloveher.(2)Itwassuchahotdaythattheydidn’tgooutforawalkasusual.注意点:1.such+a+形容词+名词+that…,可以改写成:so+形容词+a+名词+that…,例句(1)可以改写成:Sheissogoodateacherthatweallloveher.2.在such+形容词+名词复数或不可数名词+that…结构中,形容词如果是many/few或much/little时,用so不用such,即:so+many/few+可数名词复数+that…,so+much/little+不可数名词+that…(1)TherearesomanypeopleintheroomthatIcan’tgetin.(2)Themanhassomuchmoneythathecanbuyacar.6.让步状语从句引导连词有though,although;eventhough/if;whatever;howeverAlthoughheisyoung,heknowsalotofthings.虽然他年龄小,但却认识许多事物。Eventhoughyoudon’tlikehim,youstillhavetobepolite.Whateveryousay,Iwillnotchangemymind.注意although,though不能和but连用。7.比较(方式)状语从句以than为引导连词。常见连词(as)…as..,…than…;the…,the…JimisolderthanLucy(is).吉姆比路希年长。Skiingismoreexcitingthanrunning.Themoreyoupractice,themoreknowledgeyouwillget.注意than引导的比较状语从句中的谓语常省略。8.条件状语从句以if,unless为引导连词。Ifyoueatbadfood,youmaybeill.如果你吃到坏了的食物,就会生病。Ifitdoesn’traintomorrow,wewillhaveasportsmeet.注意主句是将来时,从句用一般现在时。状语从句中常见的误点1)时间状语从句和条件状语从句中的时态与主句的搭配:(俗称:主将从现)2)原因状语从句because与becauseof;Because+从句和becauseof+n./pron例如:IwaslatebecauseIdidn’tcatchthebus.Iwaslatebecauseoftherain.