状语从句 状语从句是句子的状语由一个从句充当，来修饰主句中的动词，形容词或副词等。状语从句都由从属连词引导，与主句连接，放在句末时，一般不在前面加逗号。 状语从句根据它表示的意思可分为时间，原因，条件，比较，结果，目的等类。下面我们拣重点的一个一个来分析。 时间状语从句：是由when, as, while, after, before, since, until, as soon as 等从属连词引导的状语从句。时间状语从句中的谓语动词不能用一般将来时，只能用一般现在时表示将来发生的动作或存在的状态。 如:I will call you as soon as I arrive there. 原因状语从句： because, since, as和for都表示原因。常常令我们不知该用哪个好。我们来比较一下。because语势最强，回答why提出的问题，用来说明人所不知的原因。当能够很明显的看出原因或人们已知原因，就用as或since。如：I don't like that coat,because the color looks terrible. 由because引导的从句如果放在句末，且前面有逗号，则可以用for来代替。但如果不是说明直接原因，而是多种情况加以推断，就只能用for。如：He is not here, because / for his mother is ill. 目的状语从句：表示目的状语的从句可以由in order that, so that,等词引导。如：You must raise your voice so that/in order that everybody can hear you clearly. 结果状语从句：结果状语从句常由so...that 或 such...that引导，要掌握和区分这两个句型，首先要了解so和such后面分别跟什么词。such是形容词，修饰名词或名词词组，so是副词,只能修饰形容词或副词。so 还可与表示数量的形容词many, few, much, little连用，形成固定搭配。如：The box is so heavy that I can't carry it. 让步状语从句：是由though, although 引导的状语从句。though, although 和 but不能同时使用。 Although it rained, they had a good time. 练习： 1. She will find him a kind man when she _________him. A. knows B. know C. will know D. is going to know 2. We'll go out for a walk as soon as it ________. A. stops raining B. raining C. stop to rain D. rain 3. The film was _____ interesting _____ everyone wanted to see it again. A. too, to B. so, that C. not ,until D. very, that 4. We don't understand the passage ______ there is few words in it. A. and B. if C. though D. because 5. You are sure to pass the exam _______ you study hard. A. if B. though C. that D. when 6. If you _____ free tomorrow, we won't go for a picnic. A. aren't B. won't be C. weren't D. don't 7. What was Jim doing _______ the teacher came in? A. while B. and C. when D. but 8. You must stop ______ the policeman say: "stop!" A. that B. if C. then D. until 9. --The boy failed to pass the English examination. --______ he didn't work hard. A. If B. Because C. When D. So 10. I'll go for a walk with you if it ______ tomorrow? A. won't rain B. doesn't rain C. will rain D. rain
