19.5 结果状语从句

结果状语从句常由so…that 或 such…that引导。so…that与such…that之间可以转换。例如：

The boy is so young that he can't go to school. 这男孩年龄太小，不能上学。

He is such a young boy that he can't go to school

19.6 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.　 例如：

Let's go out for a walk unless you are too tired. 如果不太累，我们去散散步。

If you are not too tied, let's go out for a walk.

典型例题

You will be late ___ you leave immediately.

A. unless　 B. until　 C. if　　D. or

答案A。句意：除非你立即走，否则你就回迟到的。可转化为 If you dong leave immediately, you will be late。B、D句意不对，or表转折，句子如为 You leave immediately or you will be late.

19.7 让步状语从句

1)though, although引导的让步状语从句，后面的从句不能有but，但是 though 和yet可连用。例如：

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. 虽然他很老了，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)

2) 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)。例如：

Child as /though he was, he knew what was the right thing to do.