在英语学习中，物主代词是一个非常基础且重要的语法点。它用于表示所属关系，用来代替名词，说明某人或某物的所有权。为了帮助大家更好地掌握这一知识点，下面我们将通过一些练习题来巩固和加深理解。
一、选择正确的物主代词填空
1. This is _______ book. I bought it yesterday.
- A. my
- B. your
- C. his
- D. her
2. The car over there is _______. She works hard to pay for it.
- A. mine
- B. yours
- C. theirs
- D. ours
3. Is this pen _______? No, it’s not _______.
- A. your; my
- B. yours; mine
- C. you; me
- D. yours; my
4. These are _______ children. They are very polite.
- A. their
- B. they
- C. them
- D. theirs
5. Whose pencil is this? It’s _______.
- A. my
- B. mine
- C. me
- D. myself
二、判断下列句子是否正确
6. This bag is hers.
( ) 正确
( ) 错误
7. The classroom is our.
( ) 正确
( ) 错误
8. These books belong to they.
( ) 正确
( ) 错误
9. That is my brother’s car.
( ) 正确
( ) 错误
10. These are my father’s pens.
( ) 正确
( ) 错误
三、改写句子
11. The bicycle is his.
改为复数形式：__________
12. The dog belongs to me.
改为同义句：__________
13. This is her bag.
改为否定句：__________
14. These are their houses.
改为一般疑问句并回答：__________
15. The book is mine.
改为特殊疑问句：__________
通过以上练习题，希望大家能够更加熟练地运用物主代词。记住，物主代词分为形容词性物主代词（如my, your, his等）和名词性物主代词（如mine, yours, his等）。前者通常放在名词前，后者则可以直接使用。希望这些题目能对你的学习有所帮助！
