1. They are my parents. 他们是我的父母。

2. They are cleaning the classroom. 他们正在打扫教室。

3. They were more interested in their own pursuits. 他们喜欢自己玩耍。

4. They are old. 他们是年老的。

5. They are ready to help others. 他们时刻准备好去帮助别人。

6. They are the first people in China who once looked at the earth from the space. 他们是从太空看到地球的第一批中国人。

7. They are my friends. 他们是我的朋友。

8. They are playing football. 他们正在踢足球。

9. They are doing homework. 他们正在做作业。

10. They are students. 他们是学生。

11. They are beautiful. 他们是美丽的。

12. They are playing basketball. 他们正在打篮球。

13. They are going skiing tomorrow. 他们明天要去滑雪。

14. They are gone. 他们已经走了。

15. They are as good americans as i am. 他们是美国人，跟我一样货真价实。

16. They are so buddy-buddy. 我感到奇怪的是她们俩那么友好。

17. They are impossible, but i like them. 他们很难对付，但我喜欢他们。

18. They are not the hardest people to get along with. 他们不是最难相处的人。

19. This is an elephant. They are very big animals and have a long memory, and a very long nose called a trunk. 这是一只大象。它们是非常大的动物，有很强的记忆力，并且有一个非常长的鼻子，叫做象鼻。

20. This is the lion. It is the king of the jungle. 这是狮子。它是丛林之王。

21. This is the rhino. He is a big animal. 这是犀牛。他是一只大动物。

22. The teacher is not responsible for the student 's success or failure. They are only there to help the student learn. 教师不为学生的成败负责。他们只是帮助学生学习而已。

这些句子涵盖了不同的主题和情境，都是简单的"they are"句型。