you have to
Cuanto más viejo seas, más tenés que preocuparte con tu salud.
The older you get, the more you need to worry about your health.
¿Hoy no tenés que ir a la escuela?
Don't you have to go to school today?
Si querés crecer, tenés que tomar mucha leche.
If you want to grow, you have to drink a lot of milk.
Pase lo que pase, tenés que mantener la calma.
Whatever happens, you have to stay calm.