【定语从句例句】在英语学习中，定语从句是一个非常重要的语法知识点，它用于修饰名词或代词，使句子更加具体和清晰。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。以下是对定语从句的总结，并附上一些典型例句供参考。
一、定语从句基本结构
定语从句由一个主句和一个从句组成，其中从句用来修饰主句中的某个名词或代词。从句通常位于被修饰词之后，通过关系词连接。
- 先行词：被修饰的名词或代词
- 关系词：引导从句的词（who, that, which, where 等）
- 从句：包含动词和其他成分的句子部分
二、常见关系词及用法
| 关系词 | 用法说明 | 例子 |
| who | 指人，在从句中作主语或宾语 | The girl who is talking to Tom is my sister. |
| whom | 指人，在从句中作宾语 | The man whom you met yesterday is a doctor. |
| whose | 表示所属关系 | The boy whose bag was lost is crying. |
| which | 指物，在从句中作主语或宾语 | The book which I bought yesterday is very interesting. |
| that | 指人或物，在从句中作主语或宾语 | The man that called me is my teacher. |
| where | 表示地点，在从句中作状语 | This is the house where I grew up. |
| when | 表示时间，在从句中作状语 | I still remember the day when we first met. |
| why | 表示原因，在从句中作状语 | That’s the reason why he left early. |
三、定语从句例句汇总
| 例句 | 说明 |
| The student who got the highest score is from Class 3. | “who”指人，作主语 |
| The book which is on the table is mine. | “which”指物，作主语 |
| The man whom you saw at the park is my uncle. | “whom”指人，作宾语 |
| The city where we met will always be special to me. | “where”表示地点 |
| The reason why she refused the job is unclear. | “why”表示原因 |
| The car that I bought last week is very fast. | “that”指物，作宾语 |
| The girl whose father is a doctor is very smart. | “whose”表示所属关系 |
四、注意事项
1. 关系词不能省略：当关系词在从句中作宾语时，有时可以省略，但并非所有情况下都可以。
2. 区分“that”和“which”：在非限制性定语从句中，只能用“which”，而“that”多用于限制性从句。
3. 避免重复：使用定语从句时，要确保不与主句重复信息，保持句子简洁明了。
通过以上总结和例句，可以更清晰地理解定语从句的结构与用法。掌握这一语法点，有助于提高英语表达的准确性和丰富性。