在小学阶段，学习英语中的形容词是比较和最高级是一个重要的部分。通过掌握形容词的比较级和最高级，学生可以更好地表达事物之间的差异和程度。下面是一些练习题，帮助孩子们巩固这一知识点。
一、填空题
请根据提示填写正确的形容词形式：
1. This book is ________ (big) than that one.
2. She runs ________ (fast) in her class.
3. The sun is ________ (hot) in summer.
4. My sister is ________ (young) than me.
5. This river is ________ (wide) than that one.
二、选择题
从括号中选择正确的答案：
6. The mountain is ________ (tall/taller/tallest) in the area.
7. Tom is ________ (happy/happier/happiest) when he plays football.
8. This apple is ________ (sweet/sweeter/sweetest) than that one.
9. The weather today is ________ (bad/worse/worst) than yesterday.
10. Which is ________ (heavy/heavier/heaviest), the elephant or the tiger?
三、改写句子
将下列句子改为比较级或最高级：
11. John is tall. (改为比较级)
John is ________ than others.
12. The park is beautiful. (改为最高级)
The park is ________ of all.
13. Mary runs fast. (改为比较级)
Mary runs ________ than others.
14. The book is interesting. (改为最高级)
This book is ________ of all.
15. The movie is long. (改为比较级)
This movie is ________ than that one.
四、造句
请用以下单词造句，并使用其比较级或最高级：
16. Smart
比较级：________
最高级：________
17. Strong
比较级：________
最高级：________
18. Quiet
比较级：________
最高级：________
19. Happy
比较级：________
最高级：________
20. Clean
比较级：________
最高级：________
通过以上练习，相信同学们对形容词的比较级和最高级有了更深的理解。继续努力，英语学习一定会更加得心应手！
