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It's the first day at a new school! Help the student understand the rules by choosing the correct option for each blank.
All students _________________________ wear a uniform — it's the school's rule. However, you _________________________ bring your own laptop because the school provides one for every student. You _________________________ use your phone during lessons — teachers will confiscate it immediately.
The correct answers are have to, don't have to, and must not.
We use have to for external rules and obligations — the school requires uniforms. Don't have to means something is NOT necessary — bringing a laptop is optional because the school provides one. Must not expresses prohibition — using your phone is forbidden, and there is a consequence if you do.