1. Let's start now./Let's begin our class/lesson. 我们开始上课吧。

2. Sit down, please. 请坐下。

3. Who's on duty today? 今天谁值日？

4. Is everyone here? 都到齐了吗？

5. Don't be late next time.下次别迟到。

6. Go back to your seat, please. 请回到你的座位。

7. Ready? /Are you ready?准备好了吗？

8. Listen carefully, please.请听仔细了。

9. Listen to the tape recorder/the recording.请听录音。

10. In pairs, please.两人一组进行练习。

11.Let's do it one by one.我们一个一个地做。

12. Now you, please./It's your turn now.现在该你了。

13. Think it over and try again.仔细想想，再试一次。

14. Say/ Read after me, please.请跟着我说/读。

15. In English,please.请用英语回答。

16. Please take out your books.请把你们的书拿出来。

17. Please answer my question(s).请回答我的问题。

18. Please stop now./Stop now, please./Stop here,please.请停下来。

19. Stop talking./Stop talking now,please.请不要讲话了。

20. Time is up.下课时间到了。