1. You may come in, but don't be late next time.
2. I can't find my camera anywhere. I might have left it on the beach.
3. I must visit my grandmother, I haven't seen her for ages.
4. I can see the sea from my bedroom window.
5. I usually wear a uniform to work, but I don't have to wear it today, we are having a casual Friday.
6. My father can drive a car really well.
7. You must not tell anyone what I said. If you do, we are in trouble.
8. You must study well. Education is very important.
9. You may come in, but don't be late next time.
10. You should see a doctor about this. It may be serious.