在英语学习中，物主代词是表达所属关系的重要词汇之一。它们用来表示某人或某物属于谁。正确使用物主代词不仅能提升语言的准确性，还能让我们的表达更加自然流畅。下面，我们通过一系列练习题来巩固对物主代词的理解和运用。

一、基础练习

1. This is ___________ book. (my / your)

2. The pencil is not ___________. It's hers. (his)

3. Is this ___________ car? No, it's ___________. (your / mine)

4. These are ___________ pens. Those are ___________. (our / theirs)

5. Whose bag is this? It's ___________. (his)

二、进阶练习

6. Amy and Tom are sisters. Their mother is ___________. (their)

7. The dog is running to ___________. It must be his pet. (him)

8. We have two rooms. One is for ___________, and the other is for ___________. (you / us)

9. The classroom belongs to ___________. It's ___________ classroom. (they / their)

10. These books are ___________, but those notebooks are ___________. (yours / theirs)

三、综合应用

11. Please bring ___________ umbrella if it rains tomorrow. (your)

12. I saw a boy playing with ___________ dog in the park. (he)

13. The flowers on the table are ___________. They smell so nice! (our)

14. She always takes care of ___________ children when they're at school. (her)

15. The car parked outside is ___________. It has ___________ license plate. (his / his)

通过以上练习，相信你已经对物主代词有了更深入的认识。记住，物主代词分为形容词性物主代词（如my, your）和名词性物主代词（如mine, yours）。前者通常用于修饰名词，后者则可以直接作为名词使用。希望这些题目能帮助你在日常交流中更加自信地运用物主代词！

如果你还有其他疑问，欢迎随时提问哦！继续加油，你的英语水平一定会越来越棒！