6、状语从句与并列句的区别　

问题1：　

2、Not until all the fish died in the river　 _____ how serious the pollution was. (95 NMET)

　　 A. did the villagers realize　　 B. the villagers realized

　　 C. the villagers did realize　　 D. didn’t the villagers realize

状语从句的倒装一般有下面几种情况：① 否定词开头；② so 加 adj. 开头；③ as / though引导的让步状语从句。

特别注意：

　　　 Hardly … when … 　　　No sooner … than …　　　 　　　Child as he is, …

　 Hardly had he got to the station when the train left.

　 No sooner had he got to the station than the train left.

　 Child as he is, he can speak seven foreign languages.

1、So difficult _____ it to live in an English-speaking country that I determined to learn English. (01)

　　 A. I have felt　　 B. have I felt　　 C. I did feel　　 D. did I feel

5、状语从句的倒装问题　

问题1：　

2、It is almost five years _______ we saw each other last time. (05北京春季)

　A. before 　 　　B. since C. after 　 D. when

在条件，时间和让步从句中，用一般现在时表示一般将来时，用现在完成时表将来完成时，用一般过去时表过去将来时。在 since 引导的时间状语从句中，动词一般都用一般过去时，而主句常用现在完成时。

1、The house could fall down soon if no one______ some quick repair work.　 (04全国IV)

　　 A has done　　　 　 B is doing 　 C does　　　 　　 D had done

4. 状语从句的时态问题　

问题1：　

2、The old tower must be saved, ______the cost. (05浙江)

　　 A．however　 B．whatever　 C．whichever　 D．wherever

no matter wh- 与　 wh-ever 的联系及区别：

no matter wh- 只引导让步状语从句，此时与 wh-ever通用。

如: No matter when / Whenever he comes back, he should be invited to the party.

wh-ever又可引导名词性从句， No matter wh-不能。如：

Whatever I can do for you will be nothing but paying a debt.　 Whoever can help us will be welcome.

1、 He tried his best to solve the problem,　 ___ difficult it was.(05天津卷)

　　 A. however　 　　B. no matter　　　 C. whatever　　　 D although

2、Allow children the space to voice their opinions, ____they are different from your own. (05湖南卷)

　　 A. until　 B. even if　　　 C. unless 　　　 D. as though

while 是高考中的高频词，它既可引导时间状语从句，又可引导并列句，还可引导让步状语从句，表示“尽管”。even if 等于 even though，表示“即使、尽管”。as　 though 等于 as if，引导方式状语从句，表示“好像、似乎”。

问题2：