【定语从句例句大全】在英语学习中，定语从句是语法中的一个重要部分，用于修饰名词或代词，使句子更加丰富和具体。掌握定语从句的用法不仅能提高语言表达能力，还能帮助更好地理解复杂的句子结构。
以下是对定语从句的总结，并附上一些常见例句，便于学习和参考。
一、定语从句基本概念
定语从句是指在句子中充当定语的从句，通常由关系代词（如 who, whom, whose, which, that）或关系副词（如 when, where, why）引导。它用来修饰前面的先行词，说明该名词的具体内容。
二、定语从句分类及用法
| 关系词 | 用法说明 | 举例 |
| who | 指人，在从句中作主语或宾语 | The man who is talking to the teacher is my uncle. |
| whom | 指人，在从句中作宾语 | The girl whom you met yesterday is my sister. |
| whose | 表示所属关系，指人或物 | The boy whose bag was stolen is in our class. |
| which | 指物，在从句中作主语或宾语 | The book which I bought is very interesting. |
| that | 指人或物，在从句中作主语或宾语 | The car that is parked outside is mine. |
| when | 表时间，在从句中作时间状语 | I remember the day when we first met. |
| where | 表地点，在从句中作地点状语 | This is the house where I was born. |
| why | 表原因，在从句中作原因状语 | That's the reason why she left. |
三、定语从句常见结构
1. 限制性定语从句
用于限定先行词，不能省略，否则会影响句子意思。
- 例句：The woman who is wearing a red dress is my teacher.
2. 非限制性定语从句
对先行词进行补充说明，用逗号隔开，即使省略也不影响句子的基本含义。
- 例句：My brother, who lives in Beijing, is coming to visit me.
四、定语从句使用注意事项
- 当先行词是“the one”时，常用 that 引导，而不用 which。
- 例句：This is the one that I want.
- 在非正式口语中，that 可以代替 which 或 whom，但在正式写作中应区分。
- 例句：The man that I saw is my neighbor.
- which 和 that 的区别在于：which 引导的是非限制性从句，that 引导的是限制性从句。
五、定语从句例句汇总
| 句子 | 解析 |
| The student who failed the exam is very upset. | “who failed the exam”修饰“student”，表示特定的学生。 |
| The house where I grew up is now a museum. | “where I grew up”修饰“house”，说明地点。 |
| The movie which won the Oscar is fantastic. | “which won the Oscar”修饰“movie”，是非限制性从句。 |
| She is the person whom I trust completely. | “whom I trust completely”修饰“person”。 |
| The reason why he didn’t come is unclear. | “why he didn’t come”解释“reason”。 |
| The book that I borrowed from the library is overdue. | “that I borrowed from the library”修饰“book”，是限制性从句。 |
通过以上总结与例句，可以更清晰地理解和运用定语从句。建议多做练习，结合实际语境进行应用，从而提升英语表达的准确性和流畅度。
