状语从句 一个句子作另一个句子的状语时，这个句子就是另一 个句子的状语从句。状语从句的分类主要有：1时间状语从句：时间状语从句常用when， while，before，after，since，till，until，as soon as等连词来引导。2原因状语从句：原因状语从句通常由because ，since，as, for引导。3条件状语从句：条件状语从句通常由if， unless, as long as引导。4目的状语从句：目的状语从句通常由so that， in order that引导。5地点状语从句：地点状语从句常常由where来引 导。6结果状语从句：结果状语从句由 sothat，suchthat，so that引导。7比较状语从句：比较状语从句通常由 asas，比较级+ than等连词引导。8方式状语从句：方式状语从句通常由as ifas though等词引导。9让步状语从句：让步状语从句通常由 although，though，even if，whoever/no matter who等连词引导。考点一：选择引导词 He began to run he would not be late for school.A. in order that B. in order to Cso as to D because 考点二：时间状语从句 （1）时态：主将从现。即状语从句的时态受到主句动词 时态的影响。在时间状语从句、条件状语从句里，如果 主句是一般将来时、祈使句时，从句通常不用将来时态 ，而用一般现在时态表示将来的动作或状态。例如：III tell him about it as soon as I see him.我一见到 他就告诉他。III give it to him as soon as he arrives.他一到达我 就给他。If he comes，please tell me.如果他来，请告诉我。A(2)since引导的时间状语从句为一般过去时，主句为 现在完成时。例如： 自从他两年前来这里，他已经交了好几个朋友了。He has made several friends since he came here two years ago. (3)when引导的时间状语从句，主句用过去进行时态 ，从句用一般过去时态。例如： 当我进来时，他正在看电视。 He was watching TV when I came in. While he was watching TV,I came in. He ran home as he sang a happy song.考点三：条件状语从句引导条件状语从句的从属连词是if(如果)。注意：如果主句是一般将来时，条件状语从句要 用一般现在时态。例如： 如果我们不早起，我们就赶不上火车。If we dont get up early, we wont catch the train. 如果明天下雨，我就不去海滩了。 If it rains tomorrow, I wont go to the beach. 你将在这次考试中不及格除非你努力学习. You will fail in this exam, unless you work hard. 只要你努力学习,你就能及格. As long as you work hard, you can pass the exam.四:让步状语从句常用though ,although ,even if, even though 引导尽管天气很冷,他没穿大衣就出去了.Though it was very cold ,he went out without his coat.即使他不来,我也不介意.I wont mind even if ( though) he doesnt come.Though he is very young ,but he can lift the heavy box.(错)Though we were tired ,we still went on working.( 对)结果状语从句常用 sothat suchthat so that 引导I didnt get up early ,so that I didnt get a good seat .It was such bad weather that we had to stay at home .It was such an interesting book that everyone liked to read it .He is such a kind teacher that they all like him.They are such good students that they always do well in the exams.The weather is so cold that few people like to go out . He writes so carefully that he never makes a mistake.解题指导1.-Could you please tell Peter that l want to talk to him ？-Sure. I will let him know as soon as he _ back.A. comes Bcame Chas come Dwill come2. If Frank to the office tonight, give this package to him.A. came Bcomes Chas come Dwill come3. Frank a film if hes free next Saturday. （北京）Asee Bsaw Chas seen Dwill seeABD检测精练 1. -Jenny wants to know _a trip next week.-Of course, we will. But if it we ll visit the History Museum instead.A. if will you have, rains B. if you will have, rains C. where you will have, willD. when will you have, will rain 2. Tom will call me as soon as he Shanghai.A. arrives B. will reach C. arrives in D. get to3. 1 m sure he Il come to see me before he_ Beijing. A. will leave B. is leaving C. leave D. leaves 4. We TV when the telephone . A. watched; was ringing B. were watching; rang C. watch; rings D. are watching; rangBCDB5.1 won t go to see the film tonight, because I my ticket. A. lost B. have lost C. will lose D. didnt lose 6. Betty didnt go to see the film yesterday she was ill.A. because B. but C. until D. if7. May I sit nearer I can see more clearly?A. as if B. so that C. even if D. so8. _ you work hard, you will certainly succeed. A. Though B. If C. Because D. For9. he came to study in the university, he has made much progress in the study of English.A. While B. When C. Since D. After10. Id like to go swimming the water is not too cold. A. for B. unless C. if D. whetherBABBCC11. There are many league members in class 2 _ in class 4. A. both; and B. so; thatC. either; or D. as; as 12. -Do you have a big library?-No, we dont. At least, not yours. A. as big as B. as big than C. as bigger D. bigger as than 13. Suzhou is not beautiful Hangzhou.A. as , than B. so, as C. even, than D. / , than 14. Ill go to see the film with you I have time this evening. A. whether B. so C. if D. whenDABC15. you study harder, youll never pass the final exam.A. If B. Until C. Unless D. Except less16. If he harder. he will catch up with us soon.A. study B. studies C. will study D. studied 17. You will stay healthy you do more exercise, such as running and walking. A. if B. how C. before D. where18. Frank to see his grandma if he free tomorrow. A. will come, will be B. comes, is C. will come, is D. comes, will be 19. -Do you know if we will go to the cinema