Teenagers must not smoke . 
Teenagers must work hard to pass their exams 
They can go out in the evenings but they must not drink too much alcohol
They can enjoy themselves , they can have fun but they must behave properly
they cannot stay too late at night until they are allowed to do so

-they can't drive a car.
-They should not to smoke, and drink alcohol
-Teenager must
successful studies
-They can not go.. (boite de nuit)
-Teenager sould not to work as parents
-Teenager must to pass code