引言
定语从句是初中英语学习中的一大难点，它涉及到关系词的选用、句式的理解和句意的连贯。为了帮助同学们更好地掌握定语从句，本文将详细介绍定语从句的用法，并提供50道实战练习题，助力同学们攻克这一难点。
一、定语从句概述
- 定义：定语从句是用来修饰名词或代词的从句，相当于一个形容词的作用。
- 结构：由关系词引导，关系词在从句中充当一定的成分，如主语、宾语、定语等。
二、定语从句关系词
- 关系代词：who、whom、whose、which、that
- who/whom：指人
- whose：指人所有物
- which、that：指物
- 关系副词：where、when、why
- where：指地点
- when：指时间
- why：指原因
三、定语从句类型
- 限制性定语从句：与先行词关系紧密，不能省略关系词。
- 非限制性定语从句：与先行词关系较远，关系词前常加逗号。
四、实战练习题（1-25题）
题目1
The ___________ I met yesterday is my English teacher.
A. whom B. who C. which D. that
题目2
The book ___________ you gave me is very interesting.
A. which B. who C. whose D. that
题目3
She has a cat, ___________ is very clever.
A. which B. who C. whose D. that
…
题目25
The teacher ___________ is speaking is our headmaster.
A. whom B. who C. whose D. that
五、实战练习题（26-50题）
题目26
The park ___________ you visited last week is very beautiful.
A. which B. where C. when D. why
题目27
She was born ___________ we visited her in the hospital.
A. which B. where C. when D. why
题目28
She doesn’t know ___________ you are talking about.
A. who B. which C. whose D. that
…
题目50
The reason ___________ she was late for school was that she got up late.
A. which B. where C. when D. why
六、总结
定语从句是初中英语学习中不可或缺的一部分，希望同学们通过本文的学习和实战练习，能够熟练掌握定语从句的用法，提高英语水平。祝大家在英语学习的道路上越走越远！