1. She was a mean old harridan.

2. They talked like old pals.

3. The old customs are dying.

4. We will play a trick on the old abbot.

5. The old man's former cronies are all dead.

6. Old age has not dimmed her memory.

7. How old are you？ I am 13 years old.

8. The old dog is very weak, the coat is too old to wear.

9. That old man is a fount of wisdom.

10. Old age disabled him for hard work.

11. Old bikes can be bought quite cheaply.

12. Old superstitions seem incredible to educated people.

13. Don't play old tricks!

14. An old man at the age of 60 looks older than his age.

这些句子涵盖了“old”这个词在不同语境下的用法，包括描述人、物品、年龄和习俗等。希望这些句子对你有所帮助!