【定语从句例句简单】在英语学习中，定语从句是一个非常重要的语法点。它用来修饰名词或代词，使句子更加具体和清晰。掌握定语从句的用法，有助于提高阅读理解和写作能力。下面是对定语从句的基本总结，并结合一些简单例句进行说明。
一、定语从句基本结构
定语从句通常由关系代词（如 who, whom, whose, which, that）或关系副词（如 when, where, why）引导，用来修饰前面的名词或代词（称为先行词）。
| 关系词 | 用法说明 | 示例 |
| who | 指人，作主语或宾语 | The man who is talking is my teacher. |
| whom | 指人，作宾语 | The girl whom you met is my sister. |
| whose | 表示所属关系 | The boy whose book is missing is crying. |
| which | 指物，作主语或宾语 | The book which I bought is very interesting. |
| that | 指人或物，作主语或宾语 | The car that is parked outside is mine. |
| when | 指时间，作状语 | I still remember the day when we met. |
| where | 指地点，作状语 | This is the house where I was born. |
| why | 指原因，作状语 | That’s the reason why she left. |
二、定语从句使用注意事项
1. 关系词不能省略的情况：
- 当关系词在从句中作宾语时，有时可以省略（尤其在口语中），但在正式写作中应保留。
- 例：The man (who) I saw is a doctor.（可省略）
2. “that”与“which”的区别：
- “that”可以指人或物，而“which”只能指物。
- 在非限制性定语从句中，只能用“which”，不能用“that”。
3. “who”与“whom”的区别：
- “who”作主语，“whom”作宾语。
- 例：The person who called me is my friend.
- 例：The person whom I called is my friend.
4. “whose”表示所属关系：
- 既可以指人也可以指物。
- 例：The student whose essay won the prize is very talented.
三、简单例句汇总
| 句子 | 解析 |
| The book that is on the table is mine. | “that”指物，在从句中作主语。 |
| The girl who is wearing a red dress is my classmate. | “who”指人，在从句中作主语。 |
| The city where I was born is very beautiful. | “where”指地点，在从句中作状语。 |
| The reason why he failed is unclear. | “why”指原因，在从句中作状语。 |
| The man whom you met yesterday is my uncle. | “whom”指人，在从句中作宾语。 |
通过以上总结和例句，可以看出定语从句虽然结构复杂，但只要理解其基本规则并多加练习，就能轻松掌握。希望这份内容能帮助你在英语学习中更上一层楼！