1. They shouldn't wear hats in the pagoda.
2. Children are obliged to live with their parents until they reach the age of 18.
3. Do I have to tip in a coffee shop?
4. Staff doesn't need to wear vests in their company.
5. We should keep our traditional customs.
6. You must remove your shoes when entering a temple.

7. You mustn't photograph at some sacred places. 
8. It's Saturday tomorrow, Jane doesn't have to get up early.
9. You should ask them about their customs.