总复习之状语从句一、时间状语从句一般由when,while,before,after,until,assoonas,since等词引导。1)WhenIwastenyearsold,Icouldswim.2)Sheturnedoffthelightbeforeshelefttheoffice.2)Aftersheturnedoffthelight,shelefttheoffice.4)Yesterdayhedidn’tgohomeuntilhefinishedhisjobs.5)AssoonasIreachedhomejustnow,IturnedonTV.6)Whiledadisreadinganewspaper,mumiscooking.7)Whiledadwasreadinganewspaper,mumwascooking.8)WehavebeeninBeijingsincewecamehere.主句用过去时,从句也用过去的某种时态。1.Thedaysgetlongerwhenspringcomes.2.Closethedoorbeforeyouleavetheroom.3.Heoftengoestoschoolafterhehasbreakfast.4.I’llwaithereuntil/tilltherainstops.5.Youcan’tgohomeuntilyoufinishyourwork.6.Assoonashecomeshere,I’lltellhim.主句【一般将来时/现在时】+引导词+从句【现在】。大多数情况下,从句可以位于主句之前,也可以位于主句之后。不过从句在前时,主从句之间必须用逗号隔开。1)Ifitdoesn’train,we’llgoonafieldtriptomorrow.2)Wewon’tgotothepartyunlessweareinvited.二、条件状语从句由if(如果)和unless(除非)引导。三、原因状语从句,由because,since,as引导,这几个词都是表示“原因”词,语气由强至弱依次为because→since→as,不能与so连用。1、because表示直接原因,它所指的原因通常是听话人所不知道的,其语气最强。常用来回答why的提问,一般放于主句之后,也可以单独存在。--Whydidn’tLilycometoschooltoday?--Shedidn’tcometoschoolbecauseshewasill.2、since侧重主句,从句表示显然的或已为人所知的理由,常译为“因为”、“既然”,语气比because稍弱,通常置于句首,表示一种含有勉强语气的原因。Sinceeveryoneishere,let’sstart.3、as是常用词,它表示的“原因”是双方已知的事实或显而易见的原因,或者理由不是很重要,含义与since相同,但语气更弱,没有since正式,常译为“由于,鉴于”。从句说明原因,主句说明结果,主从并重。(as按照;asif好像—方式状语)Wealllikeherassheiskind.4、比较状语从句常用than(比)、as…as…(…与…一样…)、notas/so…as…(……不如……)引导。1)Thebookisasinterestingasthatone.2)HecanrunasfastasJim.3)Iamolderthanshe.=Sheisyoungerthanme.=Iamnotasyoungasshe.=Iamnotsoyoungasshe.4)HejumpedhigherthanAnn.5)Anndidn’tjumpashighashim.=Anndidn’tjumpsohighashim.五、such…that…与so…that…都可以用来引导结果状语从句,意为“如此……以致……”。1、so+adj.(adv.)+that从句。IamsosleepythatIfallasleepverysoon.HeransofastthatIcouldn’tcatchupwithhim.2①such+a/an+adj.+名词(单)+that从句。Heissuchagoodteacherthatallofusrespecthim.②such+adj.+名词复数/不可数+that从句。TheyaresuchinterestingbooksthatIwanttoreadthemoncemore.ItwassuchbadweatherthatIhadtostayathome.注意:①当名词前面有many,much,few,little等表示数量多少的限定词时,应该用so,而不能用such。TherearesomanypeopleintheroomthatIcangetin.6、目的状语从句由连词sothat,inorderthat引导。如:sothat=inorderthat为了;便于I’llrunslowlysothat/inorderthatyoucancatchupwithme.我将慢慢跑以便你能赶上我。Iopenedthewindowsothat/inorderthatfreshairmightcomein.我把窗户打开以使新鲜空气可以进来。7、让步状语从句由连词though,although,evenif/eventhough引导,不能与but连用。如:though,although虽然,(但是)evenif=eventhough即使;纵使Although/Thoughtheyarepoor,theyarehappy.=Theyarepoor,buttheyarehappy.Hewillnottellusthesecret,eventhough(evenif)heknowsit.即使他知道这个秘密,他也不肯说出来。Hewillnottellusthesecretthoughheknowsit.虽然他知道这个秘密,但却不肯说出来。注意事项:以assoonas,after,before,when,until,if(如果),unless(除非),eventhough/if等引导的状语从句,若是主句是一般将来时,则从句要用__________时来代替_________时。Iwilltellhimthenewsassoonashecomesback.他一回来我就把消息告诉他。IwillgotoseeyouifIamfreetomorrow.如果明天有空,我将去看你。一般现在将来