MODALSN OF OBLIGATION,PROHIBITION AND ADVICE / HAVE TO ,MUST,SHOULD

J HAVE TO ,MUST HAVE TO ,CHANGES FORM EJEMPLOS: I HAVE TO GO TO SCHOOL WE DONT HAVE TO GO IN THE CAR  YOU HAD TO GO TO SCHOOL SHE HAS TO BE HOME BY 10 PM HE DOESNT HAVE TO DO ANY HOMEWORK TODAY  THEY DIDNT HAVE TO CLEAN THE CAR WE DONT USE