在英语学习中，定语从句是一个非常重要的语法点。它能够帮助我们更清晰地表达事物之间的关系，使句子更加丰富和精确。为了更好地掌握这一知识点，以下是一些针对性的练习题，旨在帮助大家巩固和提高对定语从句的理解与运用能力。
练习一：选择合适的引导词
请根据句子的意思，选择最恰当的引导词填入空白处：
1. The book ________ you lent me yesterday is very interesting.
A. whoB. whomC. whichD. whose
2. The man ________ is standing near the door is my teacher.
A. whomB. whoC. whoseD. that
3. This is the factory ________ produces cars.
A. whereB. whenC. whichD. what
正确答案：
1. C 2. B 3. C
练习二：改写句子
将下列句子改写为含有定语从句的形式：
1. My father bought a new car last week. It is red.
改写：My father bought a new car last week, ________ is red.
2. The girl won the first prize in the competition. She practiced hard every day.
改写：The girl ________ practiced hard every day won the first prize in the competition.
3. The book on the table belongs to me. It has a blue cover.
改写：The book on the table, ________ has a blue cover, belongs to me.
正确答案：
1. which/that2. who/that3. which/that
练习三：翻译句子
请将以下中文句子翻译成英文，并使用定语从句：
1. 我昨天看到的那个男孩是我的朋友。
翻译：________
2. 那个我经常去的公园非常美丽。
翻译：________
3. 这是我第一次见到的老师。
翻译：________
正确答案：
1. The boy whom I saw yesterday is my friend.
2. The park where I often go is very beautiful.
3. This is the teacher whom I have met for the first time.
通过以上练习，相信大家对定语从句有了更深的理解。定语从句虽然看似复杂，但只要多加练习，就能轻松掌握。希望大家能够在实际应用中灵活运用这些知识，提升自己的英语水平！
