【英语从属连词知识点归纳】在英语语法中，从属连词（subordinating conjunctions）是用来连接主句和从句的词语。它们能够引导名词性从句、状语从句和定语从句等，使句子结构更加复杂和丰富。掌握这些连词的用法对于提高英语写作和阅读理解能力至关重要。
以下是对英语常见从属连词的总结，结合其基本用法和示例，帮助学习者更好地理解和运用。
一、从属连词分类与用法
| 从属连词 | 用法说明 | 示例 |
| because | 表示原因，引导原因状语从句 | I stayed home because it was raining. |
| since | 表示原因或时间，常用于“既然”之意 | Since you’re tired, let’s go to bed. |
| as | 表示原因或时间，语气较弱 | As it was late, we left early. |
| although / though | 表示让步，引导让步状语从句 | Although he is rich, he is not happy. |
| even though / even if | 强调让步，语气更重 | Even though it rained, we went out. |
| if | 表示条件，引导条件状语从句 | If you study hard, you will pass the exam. |
| unless | 表示“除非”，相当于“if not” | Unless you hurry, you’ll miss the train. |
| when | 表示时间，引导时间状语从句 | I called her when I arrived home. |
| while | 表示时间或对比，引导时间状语从句 | While I was cooking, she was watching TV. |
| because of / due to | 引导名词性短语，表示原因 | The delay was because of bad weather. |
| so that | 表示目的，引导目的状语从句 | She studied hard so that she could pass. |
| in order that | 同上，语气更正式 | He left early in order that he would not be late. |
| although / though / even though | 引导让步状语从句 | Though he tried, he failed. |
| because / since / as | 引导原因状语从句 | Because I was hungry, I ate something. |
| after / before | 表示时间，引导时间状语从句 | After the meeting, we had lunch. |
| until / till | 表示“直到……才”，引导时间状语从句 | I waited until he came. |
二、常见易混连词对比
| 连词 | 用法区别 | 示例 |
| because / since / as | 三者都表示“因为”，但语气不同： - because 最强调原因； - since 和 as 更口语化，常用于解释已知的事实。 | I didn’t go because I was sick. I didn’t go since I was sick. I didn’t go as I was sick. |
| although / though / even though | 三者都表示“虽然”，但 even though 语气更强，常用于强调转折。 | Although it was cold, we went out. Even though it was cold, we went out. |
| if / unless | if 表示“如果”，unless 表示“除非”，相当于“if not”。 | If you don’t study, you’ll fail. Unless you study, you’ll fail. |
三、使用建议
1. 注意语序：从属连词引导的从句通常放在主句之前或之后，但要注意从句中的主谓顺序。
2. 避免重复：不要在同一句子中重复使用多个从属连词。
3. 根据语境选择：不同的从属连词有不同的语气和侧重点，应根据上下文合理选择。
通过以上内容的学习和练习，可以有效提升对英语从属连词的理解和运用能力，为写作和口语表达打下坚实基础。