语法精讲--状语从句.docx

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1、语法复习专题(13)Unit 13状语从句警-、考点聚焦It will be five years before he hardly / scarcely when, noreturns from England.sooner than, as soon as once表示“一就”As soon as I have Once you show any Wc had hardly gotfinished fear, he / Hardlyit ,willI 11 give yu a call, attack you.had wc got into the country when it1、时间状

2、语从句(1) as when while 用法一览表。类别作 用例句asas表示“当的时候示 往往和when/while通用，但它着重强调主句与从句的 动作或事情同时或几乎同时发生。She came up as I was cooking.（同时）The runners started as the gun went off.（几乎 同时）when(at or during the time that以75在某一点的时候，又可表示在某一段时间 内，主句与从句的动作或事情可以同时发 生也可以先后发生。It was raining when we arrived.（指时间点） When we we

3、re at school, we went to the library every day.（在一段时间内）whilewhile意思是“当的时候”或“在某 一段时间里二主句中的动作或事情在从 句中的动作或事情的进展过程中发生，从 句中的动词一般要用延续性动词。在 when表示a period of time时，两者可以 互.换。Please dont talk so loud while others are working.He fell asleep while/when reading. Strike while the iron is hot,（用 as 或 when 、口，这 里的

4、while意思是“趁”）（2）引导时间状语从句的连接词除上述外还有：till, not until , until, before, since Don t get off the bus until it has stopped.He waited for his father until （till）it was twelve o clock.began to rain.No sooner had he arrived / He had no sooner arrived than she started complaining.directly, immediately, the mom

5、ent, the minute that* He made for the door directly he heard the knock.each time, every time, by the timeEach time he came to my city, he wou 1 d call on me.注意：表示未来情况，主句用将来时，从句用现在时。2、让步状语从句(1) although与though可以引导让步状语从句，不能与but连用，但可以与yet连 用。Although they are poor, (yet)they are warm-hearted.(2) even i

6、f或even though引导让步状语从句，表示“即使”，“纵然”，用来使人注 意下文所强调内容的性质。I 11 get there even if (though) I have to sell my house to get enough money to go by air.(3) no matter后接上who、what、where how等疑问词，也可以在这类疑问词后面 力口上 ever 构成 whoever、whatever wherever however 等。Don t trust him, no matter what / whatever he says.Whoever b

7、reaks the law will be published.No matter how hard the work is, you d better try to do it well.(4) as也可以引导让步状语从句。要用倒装。Child as (though)he is, he knows a lot.Much as I like it, I won t buy.Try as he would, he couldn t lift the heavy box.3、原因状语从句：because, for, as, since, now that(1)表示不知道的原因时用because,即

8、说话人认为听话人不知道，因此because从句 是全句最重要的部分，通常它被置于主句之后。You want to know why I m leaving? I m leaving because I m full.for虽然表示不知道的原因，但其语气较because要弱得多，是可说可不说的话，它只 能置于主句之后，这时，for是并列连词。如果不是因果关系，而是对前面主句的内容加以 解释或推断时，只能用 foro如：It s morning now, for the birds are singing.(很 显然，鸟叫不可能是“现在已是早上”的原因。)(2)表示已经知道的原因时用as或sinc

9、e,即某种原因在说话人看来已经很明显，或 己为听话人所熟悉，因此它是句中不很重要的部分。since要比as正式一些，它们通常被 置于语句之前，但有时却相反。Seeing all of the children already seated, he said, “Since everyone is here, let, s start.”(3)下列情况下只能使用because:在回答why的问句时；在用于强调句型时；被not所否定时。4、地点状语从句：where, whereverMake a mark wherever you have any questions.We will go whe

10、re the Party directs us.5、目的状语从句：that, so that, in order that注意：目的状语从句的谓语动词常与情态动词连用，否则可能是结果状语从句。不可置 于句首。6、结果状语从句：that, so that, so that, such that 注意：so +形容词/副词+ that从句；such +名词+ that从句。7、方式状语从句：as, as if (though)I 11 do as I am told to.It looks as if it is going to rain.8、比较状语从句：than, as9、条件状语从句：if

11、, unless, so (as) long as, in case, once, a far as, on condition that.注意if与unless的区别：不能用and连接两个unless从句，即不能有unless，and unless o但ifnot and ifnot却不受此限。You won t lose your weight unless you eat less and unless you exercise more. (X)但可以说 unless you eat less and exercise more.10、注意状语从句中从句的省略现象(1)连接词+过去分词

12、Don t speak until spoken to.Pressure can be incrased when needed.Unless repaired, the washing machine is no use.(2)连词+现在分词Look out while crossing the street.(3)连词+形容词/其他常见的有 it necessary if possible when necessary、if any 等。w二、精典名题导解选择填空1.1 dont think Ill need any money but Ill bring some.(NMET 2000)

13、A.as lastB.in caseC.once againD.in time解析：答案为Bo句意为“带些钱以防万一”，只能选择incase。引导的条件状语从句, 后面省略了【should need it。2. The WTO cant live up to its name it doesnt include a country that is home toone fifth of mankind. (NMET 2000)A.as long asB.whileC.ifD.even though解析：答案为c。本题考查状语从句的用法。句意为“假如世贸组织不包括占世界人口 五分之一的中国的话，

14、那它就名不副实”。as long as语气过于强烈，while和even though不 符合句意。3、Someone called me up in the middle of the night, but they hung up I couldanswer the phone.(NMET 2000)A.asB.sinceC 上 eforeD. until解析：答案为C。题意为：半夜里有人打来电话，我没来得及就挂了。but暗示在接话 前就挂了。4 .You should try to get a good nights sleep much work you have to do.A. however B. no matter C. although D. whatever解析：答案为A。此题考查连词用法，依据结构However +形/副+主语+谓语。故选A。5 .He speaks English well indeed, but of course not a native speaker.A. as fluent asB. more fluent thanC. so fluently asD. much fluently than解析：答案为C。此题考查50用久近.人5和25 2用/2N.庆$用法，前者主要用于否定 句，在这里要修饰谓语动词，故选C。