在英语学习中，掌握人称代词和物主代词是非常重要的一步。这些代词帮助我们更简洁地表达句子，避免重复提到名词。为了帮助大家更好地理解和运用它们，这里准备了一些练习题。

一、选择合适的代词填空

1. _______ is my friend. (She, He)

2. This book belongs to _______. (you, me)

3. _______ likes ice cream very much. (They, We)

4. The bag over there is _______. (yours, mine)

5. I can't find _______ notebook. Have you seen it? (your, his)

二、将下列句子改写成使用物主代词的形式

6. This is Tom's pen. 改为：This is _______ pen.

7. That is Mary's book. 改为：That is _______ book.

8. These are our pens. 改为：These are _______ pens.

9. Those are her shoes. 改为：Those are _______ shoes.

10. This is his car. 改为：This is _______ car.

三、判断对错

11. "The book is hers." 对还是错？（正确/错误）

12. "This is my pencil and that is her." 对还是错？（正确/错误）

13. "These books belong to them." 对还是错？（正确/错误）

14. "The bag is your." 对还是错？（正确/错误）

15. "Is this your bag?" 对还是错？（正确/错误）

通过以上练习，相信你能更加熟练地运用人称代词和物主代词了。记住，在实际应用中要根据语境选择正确的代词形式。希望这些题目对你有所帮助！如果还有任何疑问，请随时提问。继续加油吧，语言学习是一个不断积累的过程。