We are not allowed to drive on the left hand in this country. –> We are not allowed to drive on the left hand in this country. You don't have to come with me if you don't want to. –> You don't have to come with me if you don't want to. It is better for parents to take time to understand their children. –> Parents should take time to understand their children. Opening the lion's cage is against the zoo's regulation. –> Visitors are not allowed to open the lion's cage according to the zoo's regulation. If I were you, I would go and see that film. –> You should go and see that film. Teachers don't allow students to use mobile phones in class. –> Students are not allowed to use mobile phones in class. I am not allowed to go out with my friends in the evening. (mustn't) –> I mustn't go out with my friends in the evening. It is a good idea for us to take an umbrella with us when we go out. (should) –> We should take an umbrella with us when we go out. It is necessary for young people to plan for their future. (Use Have to) Young people –> Young people have to plan for their future. Ms. Ly is in charge of cleaning the floor every day. (has to) –> Ms. Ly has to clean the floor every day.