定语关系代词和副词是英语中非常重要的语法知识点，它们在句子中的使用直接影响到句子的理解和表达。下表详细介绍了定语关系代词和副词的用法及其区别。
| 词类 | 用法 | 例句 | | --- | --- | --- | | 定语关系代词 | | | | that | 用于限定名词，可以指物或人 | The book that I borrowed from the library is very interesting. | | which | 用于限定名词，只能指物 | The car which was parked outside is mine. | | who | 用于限定名词，只能指人 | The teacher who taught me English is retired. | | whom | 用于限定名词，只能指人，在从句中作宾语 | The person whom I met at the party was very friendly. | | whose | 用于限定名词，表示所有关系 | The man whose dog bit me apologized. | | 定语关系副词 | | | | where | 用于限定地点 | The restaurant where we had dinner was excellent. | | when | 用于限定时间 | The day when we first met was unforgettable. | | why | 用于限定原因 | That's the reason why he resigned from his job. |
以上是定语关系代词和副词的基本用法和区别，我们在学习和使用英语时，需要根据语境和句子结构来正确运用这些语法知识点，以便更加准确地表达自己的意思。希望这个表格能够帮助大家更好地掌握定语关系代词和副词的用法。
