1. You can / must raise your hand and wait before you ask a question.2. In the old days, teachers could / should hit students with a ruler if they
misbehaved in class.
3. In certain schools, students may / must stand when their teacher enters the room.
4. Steven wants to go out but his mum said he needn’t / can’t go until he has
finished his homework.
5. We need / mustn’t to decide who will be class president.
6. I didn’t see Bill today, he should / must have taken the day off.
7. Kate looked pale in the doctor’s office. She may / might be ill.
8. In Britain, all teens have to / may stay in school until they are 16 years of age.
9. You should / might spend time studying if you want to get good marks.
10. “Can / May I leave early today, please?” Sarah asked.