非谓语从句（Subordinate Clause）是英语语法中的一种从句，它不能独立作句子的成分，必须依附于主句，不能单独充当句子的谓语。非谓语从句主要包括以下几种类型：
一、名词性从句（Noun Clause）
1. 主语从句（Subject Clause）
- 结构：That + 主句（或 which + 主句）
- 功能：作主语、宾语、表语等
- 例句：
- I know that he is a doctor.
- She wondered if he would come.
2. 宾语从句（Object Clause）
- 结构：that + 主句（或 which + 主句）
- 功能：作宾语
- 例句：
- I found out that he was late.
- He asked her if she would like to go.
3. 表语从句（Predicative Clause）
- 结构：that + 主句（或 which + 主句）
- 功能：作表语
- 例句：
- He realized that he had made a mistake.
二、形容词性从句（Adjective Clause）
1. 定语从句（Adjective Clause）
- 结构：which + 主句 或 that + 主句（通常用 which）
- 功能：作定语
- 例句：
- The book which I read was interesting.
- The man who came in was my friend.
2. 宾语补足语从句（Object Complement Clause）
- 结构：that + 主句（或 which + 主句）
- 功能：作宾语补足语
- 例句：
- He told me that he would come.
三、动词性从句（Verb Clause）
1. 宾语从句（Object Clause）
- 结构：that + 主句（或 which + 主句）
- 功能：作宾语
- 例句：
- She wrote that he was happy.
2. 主语从句（Subject Clause）
- 结构：that + 主句（或 which + 主句）
- 功能：作主语
- 例句：
- I think that he is a good teacher.
3. 表语从句（Predicative Clause）
- 结构：that + 主句（或 which + 主句）
- 功能：作表语
- 例句：
- He found that he had forgotten the password.
四、介词性从句（Prepositional Clause）
1. 介词短语从句（Prepositional Phrase Clause）
- 结构：介词 + 从句
- 功能：作介词的宾语
- 例句：
- I am interested in the topic that we discussed.
五、非谓语从句（Subordinate Clause）
1. 动名词从句（Gerund Clause）
- 结构：-ing + 主句
- 功能：作主语、宾语、定语等
- 例句：
- She loves going to the park.
- I find it difficult to understand the problem.
2. 动词不定式从句（Infinitive Clause）
- 结构：to + 动词原形 + 主句
- 功能：作主语、宾语、定语等
- 例句：
- I want to know what happened.
- He decided to leave early.
3. 动词的分词形式（Participial Phrase）
- 结构：having done + 主句 或 done + 主句
- 功能：作定语、状语等
- 例句：
- The book written by him is very good.
- She who is late will be punished.
六、非谓语从句的语法特点
- 不能独立成句，必须依附于主句。
- 不能充当谓语，只能作主语、宾语、定语、状语等。
- 通常由连词引导，如 that, which, who, when, where, why, how 等。
- 有时可以省略主语和动词，但必须保留连词。
七、非谓语从句的用法总结
| 类型 | 结构 | 功能 | 例句 |
|---|---|---|---|
| 动名词从句 | -ing + 主句 | 作主语、宾语、定语 | She loves going to the park |
| 动词不定式从句 | to + 动词原形 + 主句 | 作主语、宾语、定语 | I want to know what happened |
| 动词的分词形式 | having done + 主句 / done + 主句 | 作定语、状语 | The book written by him is very good |
八、非谓语从句的常见错误
- 误用连词：如 that, which, who 不能替代 when, where, why, how 等。
- 省略主语或动词：如 having done + 主句 必须保留 having。
- 混淆从句类型：如 which 不能作主语，that 不能作宾语。
九、练习题
- She found out that he was late.
- I wondered if he would come.
- He realized that he had made a mistake.
- The book written by him is very good.
- The man who came in was my friend.
如需进一步学习非谓语从句的用法、翻译技巧或写作中的应用，可以继续提问！