【引导状语从句的从属连词都有哪些】在英语语法中，状语从句是用来修饰主句的，表示时间、原因、条件、目的、结果、让步、方式等。引导这些从句的从属连词是连接主句和从句的重要桥梁。了解常见的引导状语从句的从属连词，有助于我们更准确地理解和使用英语句子结构。
以下是对常见引导状语从句的从属连词的总结：
一、按从句类型分类的常用从属连词
| 从句类型 | 常见从属连词 |
| 时间状语从句 | when, while, as, before, after, until, since, once, whenever, as soon as |
| 原因状语从句 | because, since, as, for, now that, in that |
| 条件状语从句 | if, unless, provided that, as long as, on condition that, in case |
| 目的状语从句 | so that, in order that |
| 结果状语从句 | so...that..., such...that... |
| 让步状语从句 | although, though, even though, despite, in spite of, no matter what/when/where |
| 方式状语从句 | as, just as, like, the way |
| 比较状语从句 | than, as...as... |
二、常见从属连词的用法简要说明
1. 时间状语从句
- when：表示“当……的时候”，常用于描述两个同时发生或先后发生的动作。
例：I was reading when she called.
- while：强调两个动作同时进行。
例：She was cooking while I was cleaning.
- as：也表示“当……时”，但更强调动作的同步性。
例：As he walked into the room, everyone turned to look.
2. 原因状语从句
- because：最常用的表达原因的连词，语气较强。
例：He didn't go because he was tired.
- since / as：语气较弱，常用于已知信息。
例：Since it's raining, we'll stay indoors.
3. 条件状语从句
- if：表示假设条件。
例：If you study hard, you will pass the exam.
- unless：相当于“if not”。
例：You won't succeed unless you try.
4. 目的状语从句
- so that / in order that：表示“为了……”。
例：He worked hard so that he could afford a car.
5. 结果状语从句
- so...that... / such...that...：表示“如此……以至于……”。
例：He is so tired that he can't move.
6. 让步状语从句
- although / though：表示“尽管”。
例：Although it was late, they kept working.
7. 方式状语从句
- as：表示“像……一样”。
例：Do as I tell you.
8. 比较状语从句
- than / as...as...：用于比较。
例：She is taller than me. / He runs as fast as his brother.
三、注意事项
- 有些连词可以引导多种类型的状语从句，例如 as 可以引导时间、方式、原因等。
- 在使用某些连词时要注意语序和搭配，如 so...that... 和 such...that... 的区别。
- 有些连词在口语中使用频率较高，而书面语中可能更倾向于使用正式表达。
通过掌握这些常见的引导状语从句的从属连词，我们可以更加灵活地构造复杂句子，提高语言表达的准确性与多样性。