1状语从句(句子成分完整)1原因状语从句because,since,as,for区别:because语气最强回答whybecause不与so连用since=nowthat表示显而易见的原因“既然…因为…”as“因为…既然…语气最弱for是并列连词,表示推断的原因,for前常要加逗号2注:seeingthat/nowthat/consideringthatinthat/giventhat这几个词汇与since引导的原因状语从句意思相近,都表示“既然…考虑到”2地点状语从句WherewhereverWherethereisawill,thereisaway.Wemustcampwherewecanfindwater.3时间状语从句when(v延或v短)while(v延)3as表示动作同时发生“一边…一边…随着..”since(自从)before;until;thefirsttime;every/eachtime;thelasttimebythetime(到..时为止)时间状语从句考点:★Itis/hasbeen+一段时间+since(一般过去时)自从…已经多长时间了★bedoingsthwhen正在..突然…★beabouttodosthwhen即将做某事突然4★while除了“当..时”之外,还有两种用法:1)表示对比“然而”2)表示让步“虽然尽管”★before除了“在..之前“之外,还可表:还没来得及..就…HehungupbeforeIcouldsayaword★it+时间+before句型:(肯)要过多就才…(否)没过多久就….★一…就…:assoonasthemoment/minute/instantimmediatelyinstantlydirectly5Hardly…whenNosooner…thanNosooner+had+主语+过分+than(一般过去时)Hardly+had+主语+过分+when(一般过去时)★Bythetime+句子(一般过去),主句(过完)Bythetime+句子(一般现在),主句(将来完成时willhavedone)4条件状语从句if如果;supposing;provided假如aslongas;solongas;onconditionthat;only6if只要incase以防以免假使;unless除非,once一旦…在时间和条件状语从句中,要用一般现在时表将来时,现在完成时表将来完成时YoushouldnotplayoutsideunlessyouhavefinishedyourhomeworkIfweatherpermits,Iwillgoswimmingtomorrow5目的状语从句目的状语从句的谓语常含有may,might,can,7could,should,would等情态动词引导词有:sothat(以便),inorderthat(为了;以便),Lest(免得;唯恐),forfearthat(生怕;以免)。注:凡是由lest(以免;免得),incase(以防)和forfearthat(生怕,唯恐)引导的目的状语从句中,8用“should+动词原形其谓语部分should可以省略。例如:1.Keepquietincaseyou(should)interrupthim2.Sheisnowstudying,forfearthatshe(should)failinEnglish.3.Youmustwakehimearly,lesthe(should)belateforschool.6结果状语从句So/such…that..句型如此..以至于句型so+adj/adv+that9①当出现不可数名词或名词复数时,与such….that连用ItissuchbadweatherthatIaminabadmood②当出现可数名词单数时,so与形容词不分,such与a/an不分suchacleverboysocleveraboy③当名词前有manymuchfewlittle修饰时,用so….that感叹句的用法与此句型类似,what相当于suchhow相当于so即若感叹句中出现不可数名词或名词复数时,10感叹句要用what来引导若感叹句中出现可数名词单数时:whatacleverboyheis!Howcleveraboyheis!sothat可引导目的状语从句,也可以引导结果状语从句。Heworriedsothathecouldn’tsleep.他急得睡不着。(sothat引导结果状语从句)IcametotheclassearlysothatIcouldcatchthebus11(sothat引导目的状语从句)7比较状语从句倍数基本句型倍数+形容词,副词比较级+than倍数+as+形容词,副词原级+as倍数+thesizeof(heightwidthdepthweightlength)themore..themore…越…越…Themoreyouworkhard,themoreprogressyouwillmakeAs…as…和…一样…notas/so…as..和…不一12样AistoBwhatCistoDA对于B就像是C对于D8让步状语从句引导词:though,although,as,even/ifthough,nomatter-wh,whether…ornot(无论是否)以as,though引导的让步状语从句多用倒装语序,即把在从句中作表语的名词、形容词,或修饰谓语动词的副词放在as/though之前。13当作表语的单数可数名词位于句首时,名词前的不定冠词要省略Tryashemight,hestillcan’topenthedoorHardasheworked,hecouldn’tmakeendsmeetChildasheis,heknowsalotHowever引导的让步状语从句:However+adj/adv+主语+谓语Wh-ever引导让步状语从句既可以用wh-ever或nomatterwh-但若是引导主语从句或宾语从句,只能用wh-ever不能用nomatterwh-14NomatterwhathesaidIwouldnotbelievehimWhateveryousaidhasagreateffectonyourchild.注意:despite=inspiteof虽然尽管,后不可以接句子though,although都可以放在句首,但放在句末只能用thoughThoughalthough不与but连用,但可以和yet,still连用9方式状语从句:由连词:as(按照),asif,asthough(仿佛好像)引导15