34状语从句类型及其从属连词

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1、语法专项突破：状语从句讲义1.时间状语从句1）when：后接时间点的动词；when也可表示“既然”，引导原因状语从句。a.Whenthefirebrokeout,allthestudentsweresleepingsoundly.b.Itwasfoolishofyoutotakeataxiwhenyoucouldeasilywalkthereinfiveminutes.2)while:后接一段时间;也可表示让步或对比,表示“而，却,尽管”a.FatherwaspreparingareportwhileIwas

2、playingPCGames.b.WhileIunderstandwhatyousay,Ican’tagreewithyou.3)as表示一边…一边。Theytalkedastheywalkedalongtheriver.4)till与unti:用肯定式时，意为“一直到…为止”。而not…till/until结构，意为“直到…才”till不可以置于句首，而until可以a.I’llstayheretill/untiltherainstops.b.Hedidn’tgohometill/untilhefinish

3、edhishomework.5)before和since:a.before本意“在…之前”，还可以引申为“还未…就…”“不到…就…”“…才…”“趁，还没来得及”b.Itwillbe+一段时间+before…多久之后才…c.since意为“自从…时”，主句用完成时。例如:①Wehadsailedfourdaysandfornightsbeforewesawland.②ItwillbehalfayearbeforeIcomeback.③IhavewrittenhomefourtimessinceIcamehere

4、6)“assoonas;immediately;directly;themoment/minute;nosooner…than…；hardly/scarcely…when”表示一…就;①ThemomentIsawit,Ifellinlovewithit.②Nosoonerhadhereachedhomethanitbegantorain.7)“Thefirsttime;everytime;bythetime;anytime”:bythetime引导时间状语从句时，主句一般用将来完成时或过去完成时。①Thefi

5、rsttimeIsawhim,hewasschoolteacher.②Bythetimehearrivedattheairport,theplanehadtakenoff.比较:Itis/hasbeenthesecondtimethatIhavebeenhere.2.地点状语从句where;wherever(注意与定语从句的区别):a.YoushouldgowherethePartyneedsusmost.b.Makeamarkattheplacewhereyouhaveanydoubtsorquestion

6、s.c.Whereveryougo,I’llgowithyou.3.原因状语从句:because;since;as;fornow(that);seeing(that);considering(that);inthat①Shegotthejobbecauseshewasthebestcandidate.②Since/As/Nowthateverybodyishere,let’sbeginourdiscussion.③Hemustbeill,forheisabsenttoday.④Hefinishedhistas

7、kverywell,consideringthatifwasquitedifficult.⑤Theoryisvaluableinthatitcanprovideadirectionforpractice.4．条件状语从句:if;unless;so/aslongas;once;incase;onconditionthat;supposing;suppose(that);provided(that);providing(that);①You’llbelateagainunlesshurry.②Iwilldoito

8、nconditionthatyouhelpme.③Incasethereisafire,whatwillwedofirst?④Youcangooutaslongasyoupromisetobebackbefore8o’clock.⑤Suppose/Supposing(that)yourfathersawyounow,whatwouldyousay?5．目的状语从句:sothat;inordertha