2. We cannot be sure what you want ______ you tell us.

A. if　　　　　　　　　　　 B. since　　　　　　　　 C. as soon as 　　　 D. unless

在复合句中，修饰主句中动词、形容词或副词的从句叫做状语从句。状语从句可分为时间、条件、原因、结果、比较、目的、让步、方式和比较九大类。初中阶段我们需要重点掌握的有时间状语从句、条件状语从句、原因状语从句和结果状语从句。

◆时间状语从句常由从属连词when, as, while, before, after, since, till, until, as soon as引导。the moment, every time, each time可引出一个从句，相当于时间状语从句。

◆条件状语从句常由从属连词if, unless, so long as, as long as引导。

◆原因状语从句常由从属连词because, for, since, as引导。

◆结果状语从句常由从属连词so that, so…that, such…that引导。

◆在时间状语从句和条件状语从句中，如果主句是一般将来时或具有将来的含义，从句的谓语动词常用一般现在时表将来。

[练习导航]

Ⅰ. 单项选择

1. He spoke so quickly ______ no one could follow him.

A. which　　　　　　　 B. after　　　　　　　　　 C. as　　　　　　　　　　 D. that

25. He told me the date. He joined the music club.

　 ____________________________________________

24. This is the reason. We must value time.

　 ____________________________________________

23. He is the man. He has done lots of things to help these homeless people.

　 ____________________________________________

22. Look at the boy and his dog. They are running over there.

　 ___________________________________________

21. I remember everything. You did everything to help us.

　 ___________________________________________

20. That’s the reason _______ he was late for school.

　　　 A. when　　　　　　　　　　　 　 B. where　　　　　　　　 C. why　　　　　　　　　　　　 　 D. which

Ⅲ.将下列句子合并成为含有定语从句的复合句。

19. This is the room ______ he lived last year.

　　　 A. when 　　　　　　　　　　 　　B. where　　　　　　　　 C. why　　　　　　　　　　　　 　 D. which

18. I’ll never forget the day _____ I first come here.

　　　 A. when　　　　　　　　　　　 　 B. where　　　　　　　　 C. why　　　　　　　　　　　　 　 D. who