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1、 语语法专题专题 八 状语语从句状语语从句在句中作状语语，修饰饰主句中的动词动词 、形容词词或副词词等。状语语从句放在主句之前时时，常用逗号分开；放在主句之后时时，一般不用逗号。状语语从句按其意义义和作用可分为时间为时间 、条件、原因、让让步、目的、结结果、方式、比较较、地点等9种。1时间时间 状语语从句(1)时间时间 状语语从句常用的连词连词 有when, as, while, before, after, since, till(until), as soon as, hardly.when., no sooner.than, the moment等。(2)时间时间 状语语从句一般不用将来
2、时时，因此，主句若为为将来时时，时间时间 状语语从句要用一般现现在时时。(3)连词连词 when, while, as都表示“当的时时候”，但是when引导导的从句的动动作和主句的动动作可以同时发时发 生，也可以先后发发生；用as, while时则时则 强调调主句和从句的动动作同时发时发 生。(4)till(until)表示“一直到”时时，主句和从句都用肯定式；表示“直到才”时时，主句用否定式，从句用肯定式。(5)as soon as和the moment引导导的从句表示“一就”；用no sooner.than和hardly.when引导导的从句表示“一就”。主句中的动词动词 一般用过过去完成
3、时时，从句用过过去时时；而且主句一般倒装，把助动词动词 had提到前面。2原因状语语从句原因状语语从句常用because, since和as引导导。3地点状语语从句地点状语语从句常用where, wherever等连词连词 引导导，注意不要和where引导导的定语语从句相混淆。4条件状语语从句条件状语语从句用if, unless(if.not), as(so) long as(只要)等词词引导导，如果主句是将来时时，条件状语语从句用一般现现在时时表示。如：As_long_as I live, I shall work hard. 5让让步状语语从句让让步状语语从句由although(thoug
4、h), as, even if, however, whatever, no matter who(how.)等词词引导导。如：Clever as he is, he doesnt study well.注意：由as引导导的让让步状语语从句，须须将作表语语的形容词词或名词词(名词词前不用冠词词)放在句首。6结结果状语语从句结结果状语语从句一般由so, so that, so.that, such.that引导导，放在主句之后。7目的状语语从句目的状语语从句常由so.that, so that, in order that等引导导，放在主句之后。8方式状语语从句方式状语语从句放在主句之后，用as
5、, just as, as if, as though等引导导。as if和as though引导导的从句一般用虚拟拟语语气。但如果从句中所陈陈述的情况很可能实现实现 ，也可用陈陈述语语气。9比较较状语语从句比较较状语语从句常由as.as, than, not so.as., the more.the more.等词词引导导。比较较从句部分常是省略句。如：I know you better than he does.1.(2009重庆)Peter was so excited _ he received an invitation from his friend to visit Chongq
6、ing.A. where B. thatC. why D. when2(2009四川)Owen wouldnt eat anything _ he cooked it himself.A. until B. sinceC. unless D. while3(2009浙江)The medicine works more effectively _ you drink some hot water after taking it.A. as B. untilC. although D. if4(2009江苏)_ unemployment and crime are high, it can be
7、assumed that the latter is due to the former.A. Before B. WhereC. Unless D. Until5(2009天津)I travel to the Binhai New Area by light railway every day, _ do many businessmen who live in downtown Tianjin.A. as B. whichC. when D. though6(2009山东)The little girl who got lost decided to remain _ she was an
8、d wait for her mother.A. where B. whatC. how D. who7(2009成都毕业班诊断)It matters little who does it _ it is done, for you see, we are short of hands now.A. as long as B. as far asC. as early as D. as soon as8(2009皖南八校联考)Did you tell him that weve put off the meeting?No. He rushed out _ I could say anythi
9、ng.A. in case B. afterC. before D. unless9(2009南京调研)We need to think outside of box _ we are to come up with something really new.A. so that B. as long asC. once D. if10(2009南通调研)Was it there _ you were away to answer the phone?There is no doubt about it.A. that B. whichC. while D. where11(2009宁波教学检
10、测)Most birds find it safe to sleep in the trees, so _ they have eggs or young chicks, they dont use a nest.A. why B. howC. where D. unless12(2009宁波教学检测)I wont give you such help _ you tell me the truth. Its beyond my ability.A. when B. sinceC. if D. even if13(2009福建毕业班质检)In hot weather, an old tyre
11、can break again easily _ its mended.A. when B. whereC. which D. that14(2009杭州教学检测)Ill never forget such an attractive city _ I spent many happy hours there with my classmates last summer holidays.A. that B. whereC. in which D. because15(2009杭州教学检测)I could never watch any movie more than once, _ good
12、 it is.A. whatever B. howeverC. whenever D. whichever16(2009合肥教学检测)Several years had passed _ I finally realized the true value of friendship.A. when B. thatC. before D. until17(2009石家庄毕业班教学检测)We must think twice _ we make the final decision.A. when B. whileC. until D. before18(2009龙岩毕业班质检)Janet spe
13、nt money _ there were no tomorrow.A. even though B. thoughC. as though D. if only19(2009龙岩毕业班质检)My mother likes everything in order, and she always reminds us to put things back _ we get them from.A. so that B. in whichC. once D. where20(2009江南十校测试)How do you think I should receive the visitor?_ you
14、 feel about him, try to be polite.A. No matter B. HowC. Whatever D. However21(2009苏锡常镇四市教学调查)_ the quality of schooling is high, parents are eager not only to send their children to school, but also to _ them there.A. Where; keep B. Where; leaveC. When; keep D. When; leave22(2009潍坊教学检测)Many adults a
15、gree that teenagers shouldnt live alone _ they have their parents permission.A. if B. unlessC. in case D. now that23(2009湖南十校联考)They kept trying _ they must have known it was hopeless.A. if B. becauseC. when D. where24(2009西安八校联考)When solving the problem a second time, youd better be more careful _ you made a mistake.A. in case B. whereC. in which D. that25(2009南京一模)Do you think we will finish the project in time?Yes, _ the truck doesnt break down.A. even if B. unlessC. until D.
