【as能引导什么从句】在英语语法中,“as”是一个非常常见的连词,它可以引导多种类型的从句。了解“as”能够引导哪些从句,对于提高英语阅读和写作能力具有重要意义。本文将对“as”可以引导的从句类型进行总结,并通过表格形式清晰展示。
一、
“as”在英语中主要用于引导状语从句、定语从句以及名词性从句等。它可以根据上下文的不同,表达时间、原因、方式、比较、让步等多种逻辑关系。以下是对“as”引导从句的具体分类和用法说明:
1. 时间状语从句
“as”常用来表示两个动作同时发生或先后发生,强调时间上的同步性。例如:“As the sun rose, the birds began to sing.”
2. 原因状语从句
“as”可以表示原因,相当于“because”或“since”,但语气较弱。例如:“As it was raining, we stayed indoors.”
3. 方式状语从句
“as”可表示“像……一样”,引出方式或方法。例如:“You should act as your teacher told you.”
4. 比较状语从句
“as...as...”结构用于比较两者程度相等。例如:“She is as tall as her brother.”
5. 让步状语从句
“as”可以引导让步状语从句,相当于“though”或“although”,但通常倒装。例如:“Child as he is, he knows a lot.”
6. 定语从句
在“as”引导的定语从句中,“as”指代整个主句的内容,常用于正式或书面语中。例如:“He passed the exam, as we had expected.”
7. 名词性从句
“as”也可以引导主语从句、宾语从句或表语从句,但使用频率较低。例如:“What he said is as I thought.”
二、表格总结
| 引导从句类型 | 用法说明 | 例句 | 
| 时间状语从句 | 表示两个动作同时发生或先后发生 | As the sun rose, the birds began to sing. | 
| 原因状语从句 | 表示原因,语气较弱 | As it was raining, we stayed indoors. | 
| 方式状语从句 | 表示“像……一样”,引出方式 | You should act as your teacher told you. | 
| 比较状语从句 | “as...as...”结构,表示同等程度 | She is as tall as her brother. | 
| 让步状语从句 | 相当于“though”或“although”,常倒装 | Child as he is, he knows a lot. | 
| 定语从句 | 指代整个主句内容,常用于正式语境 | He passed the exam, as we had expected. | 
| 名词性从句 | 引导主语、宾语或表语从句 | What he said is as I thought. | 
通过以上分析可以看出,“as”是一个多功能的连词,在不同的语境下可以引导多种从句,掌握其用法有助于更准确地理解和运用英语语言。
 
                            

