1. Hello, my name is John.

2. How are you？

3. Good morning, class.

4. Please sit down and listen.

5. Can you hear me？

6. I’m standing on the Great Wall of China and talking to you.

7. Can you send me a postcard？

8. Good morning/Good afternoon.

9. Whats your name？

10. Excuse me, could you please tell me your name？

11. How do you do？

12. How are you？

13. Nice to meet/see you.

14. I want to join the art club.

15. I can play table tennis and chess.

16. You are good at telling stories.

17. Can you help me with my homework？

18. My favorite subject is English.

19. She is always late for class.

20. Our school starts at 8:30 in the morning.

21. I like to play basketball with my friends after school.

22. The weather is nice today.

23. I need to study for my math test.

24. The teacher is giving a lecture on history.

25. No smoking! Don't smoke here!

26. I arrived/was late for the meeting yesterday.

27. Dave has to be in bed early every night.

28. It sounds like fun.

29. I listen.

这些句子涵盖了问候、介绍、询问、表达喜好、日常活动等多个方面，适合七年级下册学生学习和使用。建议学生通过多读、多听、多说、多写等方式，进一步巩固和运用这些句子。