状语从句 (2)

1、一、定义：一、定义：在复合句中担任状语成分的从句。在复合句中担任状语成分的从句。二、分类：二、分类：时间、条件、结果、目的、原因、让步、时间、条件、结果、目的、原因、让步、比较、方式、地点状语从句。比较、方式、地点状语从句。三、用法：三、用法：1. 时间状语从句时间状语从句when, while, as 当当时时 before 在在前前 after 在在后后 until 直到直到since 自从自从 as soon as 一一就就 It was snowing when he arrived at the station. Dont go away before I leave. They h

2、ave lived here for 40 years since they were born.*主主句：一般句：一般将将来时来时 从从句：一般句：一般现现在时在时 祈使句祈使句 情态动词情态动词 Ill call you as soon as I get there. They wont leave until you come. Give it to Mary when you see her. You can go out to play after the rain stops.not until 直到直到才才until 直到直到为止为止 (主句用延续性动词主句用延续性动词) Mar

3、y didnt go to bed until her mother returned. They didnt know about it until you told them. Well wait until the doctor comes. This shop is open until midnight, seven days a week.2. 条件状语从句条件状语从句if 如果如果 unless (= if not) 如果不，除如果不，除非非 主将从现主将从现 Well come to see you sometime next week if we have time. You

4、 cant learn a language well unless you work hard.= You cant learn a language well _ you _ work hard. Please help me if you are free.ifdont3. 结果状语从句结果状语从句sothat, suchthat 如此如此以至于以至于 He ran _ fast that we didnt catch him. We have _ much time that we can finish the work very well.Tom is _ a clever boy

5、that we all like him.= Tom is _ clever a boy that we all like him.sososuchso4. 目的状语从句目的状语从句so that 为了，以便于为了，以便于从句中的谓语动词常用从句中的谓语动词常用may (might)，can (could)，should等情态动词。等情态动词。 He worked day and night so that he could succeed. I went to the lecture early so that I could find a good seat.比较：比较：I went to

6、 the lecture so early that I found a good seat.5. 原因状语从句原因状语从句because, since, as 因为因为 He isnt at school today because he is ill. Since you cant answer the question, you can ask someone for help. As the weather was fine, I opened all the windows.比较：比较：He must be ill, for he isnt at school today. (并列句

7、，表推测并列句，表推测)6. 让步状语从句让步状语从句though, although 尽管，虽然尽管，虽然不和不和but连用，可和连用，可和yet连用。连用。 I wont mind though he doesnt come. Though it was very cold, she went out without an overcoat. He can look after himself very well although he was still young.7. 比较状语从句比较状语从句asas 像像 not as/soas 不如不如 than 比比the+比较级比较级, th

8、e+比较级比较级 越越越越 He wrote as carefully as I (did). She didnt write as/so carefully as I (did). I wrote more carefully than he (did). The more carefully you write, the fewer mistakes you will make.1. Will you please give the dictionary to Jane? Sure, Ill give it to her _ she arrives here. A. beforeB. un

9、til C. becauseD. as soon as2. My father was preparing for his speech _ my mother was doing some washing last night. A. ifB. while C. unlessD. until3. I didnt _ you were going to leave _ 3 oclock. A. find, atB. realize, until C. tell, after D. remember, before4. Computers, however, are actually _ the

10、y were five years ago. A. so cheap asB. cheaper than C. so expensive as D. much expensive than5. Ill park the car at Pacific Palace, _ the car park there is full. A. unlessB. if C. whenD. after6. _ you dont go to bed earlier, you will feel tired in the morning. A. UnlessB. If C. ThoughD. Until7. The

11、 air in mountain areas is _ that in big cities. A. as fresh asB. fresher than C. as dirty asD. dirtier than8. _ it snowed heavily yesterday, nobody in our class missed the lesson. A. Though B. Because C. Unless D. Since11. If it _ tomorrow, we will stay at home. We wont go to the museum. A. rainB. rains C