1 方式状语从句：像..一样
As/like/as if/as though/the way

The boy talks as if he is a old man
这个男孩说话的方式就像他是一个老男人一样

As if/as though引导方式状语从句表示一种 与事实相反的情况


2 让步状语从句：无论/不管
Whether/although/though/even though/even if/whatever/
However

We'll make a trip even though the weather is bad.
尽管天气很糟，我们还是去旅行。

表示从句与主句与事实无关 可以忽略从句的原因


3条件状语从句：除非
If/unless

We'll start our project if the president agrees.
如果总统同意的话，我们就会开展我们的项目。

不满足从句的条件时候，主句的事实不会发生。


4目的状语从句：为了/以便
So that/so/ in order that

I want to expand your point of view so you can see something.
我想拓宽你们的视野以便你们看清一些东西。

从句表示目的解释主句的事实


5结果状语从句：如此以至于
so…that…，such…that…
He was so angry that he couldn't say a word. 他气得说不出话。

6原因状语从句
because, since, as/因为/既然/由于

Since you asked, let me tell you why.
既然你问起，那我就告诉你原因吧……

7比较状语从句：
Than/as as/no as as/a比b/a和b一样/a不如bx

The day is more bright and beautiful today than it was yesterday.今天天气比昨天更加晴朗,更加美好。
The tree is as tall as the building is．这棵树和那栋楼一样高。
This dictionary is not as useful as you think. 这本字典不如你想象的那样有用。