五．结果状语从句 　

结果状语从句常由so… that 或 such…that引导，掌握这两个句型，首先要了解so 和 such与其后的词的搭配规律。

比较：so和 such

　其规律由so与such的不同词性决定。such 是形容词，修饰名词或名词词组，so 是副词，只能修饰形容词或副词。 so 还可与表示数量的形容词many, few, much, little连用，形成固定搭配。

　so foolish　　　　　　　such a fool　　　　　　　
　so nice a flower　　　　 such a nice flower　 　　
　so many / few flowers　 such nice flowers　　　　
　so much / little money. such rapid progress　　　
　so many people　　　　　such a lot of people
　 　
（ so many 已成固定搭配，a lot of 虽相当于 many，但 a lot of 为名词性的，只能用such搭配。）

　 so…that与such…that之间的转换既为 so与such之间的转换。

　 The boy is so young that he can't go to school.

　 He is such a young boy that he can't go to school
　
六．条件状语从句

连接词主要有 if, unless, as/so long as, on condition that 等。.

　if 引导的条件句有真实条件句和非真实条件句两种。非真实条件句已在虚拟语气中阐述。

　 unless = if not.　
　 Let's go out for a walk unless you are too tired.
　 If you are not too tied, let's go out for a walk.

七．让步状语从句

though, although
　注意： 当有though, although时，后面的从句不能有but，但是 though 和yet可连用

　Although it's raining, they are still working in the field.　
　虽然在下雨，但他们仍在地里干活。
　
　 He is very old, but he still works very hard.　
　虽然他很老，但仍然努力地工作。

　Though the sore be healed, yet a scar may remain.
　伤口虽愈合，但伤疤留下了。 （谚语）

1)　as, though 引导的倒装句

　 as / though引导的让步从句必须表语或状语提前（形容词、副词、分词、实义动词提前）。

　　Child as /though he was, he knew what was the right thing to do.
　= Though he was a small child, he knew what was the right thing to do.

注意： a.　句首名词不能带任何冠词。
　　　　b.　句首是实义动词，其他助动词放在主语后。如果实义动词有宾语和状语，随实义动词一起放在主语之前。

　　 Try hard as he will, he never seems able to do the work satisfactorily.
　 = Though he tries hard, he never seems…

　虽然他尽了努力，但他的工作总做的不尽人意。
2)　ever if, even though.　即使
　　We'll make a trip even though the weather is bad.

3) whether…or-　 不管……都
　　 Whether you believe it or not, it is true.

4)　"no matter +疑问词" 或"疑问词+后缀ever"
　　 No matter what happened, he would not mind.
　　 Whatever happened, he would not mind.
　 替换：no matter what = whatever
　　　　 no matter who = whoever
　　　　 no matter when = whenever
　　　　 no matter where = wherever
　　　　 no matter which = whichever
　　　　 no matter how = however
　 注意：no matter 不能引导主语从句和宾语从句。
　（错）No matter what you say is of no use now.
　（对）Whatever you say is of no use now.
　　　 你现在说什么也没用了。(Whatever you say是主语从句)
　（错）Prisoners have to eat no matter what they're given,
　（对）Prisoners have to eat whatever they're given.　囚犯们只能给什么吃什么。

八．时间状语

比较while, when, as
1）as, when 引导短暂性动作的动词。
　　　 Just as / Just when / When I stopped my car, a man came up to me.
2）当从句的动作发生于主句动作之前，只能用when 引导这个从句，不可用as 或 while。
　　　 When you have finished your work, you may have a rest.
3）从句表示"随时间推移"连词能用as，不用when 或while。
　　　 As the day went on, the weather got worse.　
　　　日子一天天过去，天气越变越坏。