- We must keep quiet when the teacher is talking.
- We must walk carefully.
- Let’s raise our hands before answering questions.
- Let’s wash our hands before meals.
- We must play only when you can.
- We must only talk when the teacher says we can.
- We mustn’t stand on the toilet.
- We mustn’t talk while eating.
- We mustn’t sit on the floor.
- Don’t play when the teacher is teaching.
- We mustn’t sing randomly in class.
- Don’t run in the corridor.
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