前面我们已与大家分享了定语从句的概念、用法等，同时，状语从句也是职称英语历年考题中易考的语法点，所以希望广大考生能进行全面掌握。新东方在线网络课堂职称英语辅导团队根据多年辅导经验，将状语从句的类别、用法、考点等归集如下，以帮忙职称英语考生对状语从句来重新熟悉并达到熟练运用，达到提高成绩的目的。

　　一、状语从句的概念和类别

　　状语从句指句子用作状语时，起副词作用的句子。它可以修饰谓语、非谓语动词、定语、状语或整个句子。根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句。状语从句一般由连词(从属连词)引导，也可以由词组引起。从句位于句首或句中时通常用逗号与主句隔开，位于句尾时可以不用逗号隔开。

　　二、考点聚焦

　　1、时间状语从句(1)as、when、while用法as表示“当……的时候”，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 )既可以表示在某一点的时候，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 were at school, we went to the library every day.(在一段时间内)

　　while意思是“当……的时候”或“在某一段时间里”。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 don’t talk so loud while others are working.He fell asleep while/when reading. Strike while the iron is hot.(用as或when不可，这里的while意思是“趁……”)

　　(2)引导时间状语从句的连接词除上述外还有：①till, not … until …, until, before, sinceDon’t get off the bus until it has stopped.He waited for his father until(till)it was twelve o’clock.It will be five years before he returns from England.

　　②hardly / scarcely … when, no sooner … than, as soon as once表示“一……就”As soon as I have finished it , I’ll give yu a call.Once you show any fear, he will attack you.We had hardly got / Hardly had we got into the country when itbegan to rain.No sooner had he arrived / He had no sooner arrived than she started complaining.

　　③directly, immediately, the moment, the minute that… 一……就He made for the door directly he heard the knock.

　　④each time, every time, by the timeEach time he came to my city, he would 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 if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’ll 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加上ever构成whoever、whatever、wherever、however等。Don’t trust him, no matter what / whatever he says.Whoever breaks 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for。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since,即某种原因在说话人看来已经很明显，或已为听话人所熟悉，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:①在回答why的问句时;②在用于强调句型时;③被not所否定时。

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