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1、 在主从复合句中作状语的从句叫做状语从句。状语从在主从复合句中作状语的从句叫做状语从句。状语从句由从属连词引导，与主句连接，位于句首时，常用逗号句由从属连词引导，与主句连接，位于句首时，常用逗号与主句分开，位于句末时，其前一般不用逗号。与主句分开，位于句末时，其前一般不用逗号。 状语从句根据其用途可分为时间状语从句、条件状语从句根据其用途可分为时间状语从句、条件状语状语从句从句、原因、原因状语从句状语从句、目的、目的状语从句状语从句、结果、结果状语从句状语从句、让、让步步状语从句状语从句、比较、比较状语从句状语从句、地点、地点状语状语从句等。从句等。分类分类引导词引导词例句例句时间时间状语从句
2、状语从句when/while/as (当当时时), before (在在之前之前), after (在在之后之后), since (自从自从 以来以来), not until (直到直到才才), as soon as (一一就就), as (一边一边一一边边)When it began to rain, Ben was helping his mom make dinner.He writes as he listens.He became an English teacher after he graduated from Peking University.He did not go to
3、 bed until his father came back.条件条件状语从句状语从句if (如果如果), as long as (只要只要), unless (除非除非)Unless bad weather stops me, I go for a walk every day.分类分类引导词引导词例句例句原因状语原因状语从句从句because (因为因为), since (既然既然), as (由于由于)I didnt accept his help because I wanted to try it myself.Since we have no idea about this pr
4、oblem, lets ask Mr. Wang for help. 目的目的状语从句状语从句so that (以便以便, 为了为了), in order that (为了为了)They sped up so that/ in order that they could get there on time. 分类分类引导词引导词例句例句结果结果状语从句状语从句so that / such that (如如此此以至于以至于)Its so hot that nobody wants to go out.让步让步状语从句状语从句though/although (尽管尽管, 虽然虽然), even t
5、hough/if (即使即使), whatever (无论什么无论什么), whenever (无论何时无论何时), wherever (无论哪里无论哪里) Although milk is good， you should not drink too much of it.Whatever you want to be, you need to work hard to achieve it.分类分类引导词引导词例句例句比较比较状语从句状语从句than (比比), as as (和和一样一样), not as/so as (不不如如)He is as tall as his brother.
6、地点地点状语从句状语从句where (的地方的地方), wherever (无论哪里无论哪里) Where there is a will, there is a way.You can sit wherever you like.1. 时间状语从句时间状语从句 (1) when引导的时间状语从句引导的时间状语从句，主句主句是是一般将来时一般将来时或祈使句或祈使句，表示将来的意义时，表示将来的意义时，从句从句通常通常用用一般一般现在时。现在时。(简称简称 “主将主将从现从现” “主祈从现主祈从现” )。 e.g. When he comes here, I will call you. whi
7、le引导引导的时间状语的时间状语从句从句表示正在发生某事的同时，另一表示正在发生某事的同时，另一件事发生了或正在发生。件事发生了或正在发生。多用进行时态，主句时态视情况多用进行时态，主句时态视情况而定。而定。 e.g. While the teacher is speaking, I am listening carefully.(2) as soon as引导的时间状语从句引导的时间状语从句，主、从句的时态：，主、从句的时态： 主将从现。主将从现。 e.g. Ill tell him the news as soon as he arrives. 主、从句同为过去时。主、从句同为过去时。 e
8、.g. As soon as he got home, he threw his bag on the sofa.(3) until/till引导引导的时间状语的时间状语从句从句 主句主句为肯定句：谓语动词必须是延续性动词为肯定句：谓语动词必须是延续性动词，表示这一动，表示这一动作或状态一直延续到作或状态一直延续到until/till所表示的时间为止。所表示的时间为止。 e.g. Ill wait for you till/until you come to see me. 主句主句为为否否定句：谓语动词是非延续性动词定句：谓语动词是非延续性动词, 常用句式常用句式 not until “直到
9、直到才才”。表否定意义的词还有表否定意义的词还有never, nothing等。等。 e.g. I didnt go to bed until I finished my homework.(4) since引导引导的时间状语的时间状语从句从句用一般过去时，主句用一般现在时用一般过去时，主句用一般现在时或现在完成时。或现在完成时。即即 have done since sb. did “自从某人自从某人做了做了一直一直”; It is + 一段时间一段时间 + since sb. did “(自从自从) 做某事有做某事有 (多久多久)”。 e.g. I have worked in this s
10、chool since I graduated from Peking University. It is 10 years since I began to study English.2. 条件状语从句条件状语从句 (1) 时态时态: 主句为一般将来时或含有情态动词，从句用一般现主句为一般将来时或含有情态动词，从句用一般现在时。在时。 e.g. Ill visit the Great Wall if it doesnt rain tomorrow. We cant pass the exam unless we study hard. (2) “祈使句祈使句, + and/or + 陈述句
11、陈述句”中，祈使句在意义上相当于中，祈使句在意义上相当于一个条件状语从句。一个条件状语从句。 e.g. Use your head, and youll find a way. = If you use your head, youll find a way.3. 原因状语从句原因状语从句 (1) 通常用通常用because, since, as 引导原因状语从句引导原因状语从句。回答。回答why提提出的问题用出的问题用because。 e.g. I didnt go to the movies because I have to finish my report. (2) 如果原因是人们已知
12、的事实，就要用如果原因是人们已知的事实，就要用since “既然既然”引导。引导。 e.g. Since you cant answer the question, you can ask someone else for help.4. 目的状语从句目的状语从句 (1) 引导词引导词(组组): so that, in order that等。从句谓语中常含有等。从句谓语中常含有may, can, must, will等情态动词。等情态动词。 e.g. He must get up early so that he can go to work on time. (2) 当主、从句的主语一致时
13、，从句可用当主、从句的主语一致时，从句可用 “so as to/in order to + 动词原型动词原型”代替。代替。 e.g. He worked day and night in order that he could succeed. = He worked day and night in order to succeed.5. 结果状语从句结果状语从句 (1) 如此如此以致于以致于 so that与与such that的区别：的区别： so + 形容词形容词 / 副词副词 + that such + a / an + 形容词形容词 + 单数单数可数可数名词名词 + that su
14、ch + 形容词形容词 + 复数复数可数名词可数名词/不可数不可数名词名词 + that so + 形容词形容词 + a / an + 单数单数可数可数名词名词 + that 当名词前面有当名词前面有many或或much修饰时，用修饰时，用so而不用而不用such。 e.g. He is such a young boy that he cant go to school. = The boy is so young that he cant go to school. We have so much time that we can finish the work very well.(2)
15、 so that 句型的否定形式可用句型的否定形式可用too to 或或 not enough to构成的简单句代替。构成的简单句代替。 e.g. He is so young that he cant go to school. = He is too young to go to school. = He is not old enough to go to school.I. 单项选择单项选择1. My cousin became a country doctor _ he finished medical school. A. after B. so that C. but D. so
16、(2021天津天津)2. Ann didnt know anything about the news _ Mrs. Brown told her. A. because B. until C. if (2021吉林吉林)AB3. _ he heard the little girl crying for help outside, he rushed out of the room. A. As soon as B. Unless C. If D. Although (2021云南云南) 4. Your parents wont let you go out alone_ they are
17、sure youre safe. A. since B. if C. unless(2021黑龙江齐齐哈尔黑龙江齐齐哈尔) AC5. _ he is my favorite singer, I didnt buy his new CD. A. If B. Ever sinceC. Even though D. Because(2021内蒙古包头内蒙古包头)6. _ he is 72 years old, _ he keeps running every day. A. Although; but B. Although; / C. But; /(2021湖南岳阳湖南岳阳)CB7. I love
18、 to listen to rock music _ I am running. A. while B.after C. since D. until(2021河北河北)8. _ we always wait for another day, fruitlessly our life will pass away. A. Until B. If C. Although D. Whether(2021江苏扬州江苏扬州)BA9. _ I walk around in this small town, what I see makes me think of my childhood. A. Wha
19、tever B. Wherever C. Whoever(2021青海青海)10. We cant avoid traffic accidents unless everyone _ the rules. A. follows B. breaks C. will follow D. will break(2021辽宁丹东辽宁丹东)BAII. 单句填空单句填空1. U_ you practice more, you wont succeed in winning the game.(2021四川南充四川南充)2. A_ the traffic was heavy, we got to the railway station on time.(2020浙江杭州浙江杭州) 3. I like dogs _ theyre friendly and smart.(2020湖南常德湖南常德)UnlessAlthoughbecause