must program
Verbo regular: program - programmed- programmed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must program
you must program
he must program
we must program
you must program
they must program 	I must be programming
you must be programming
he must be programming
we must be programming
you must be programming
they must be programming	I must have programmed
you must have programmed
he must have programmed
we must have programmed
you must have programmed
they must have programmed	I must have been programming
you must have been programming
he must have been programming
we must have been programming
you must have been programming
they must have been programming	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not program
you must not program
he must not program
we must not program
you must not program
they must not program 	I must not be programming
you must not be programming
he must not be programming
we must not be programming
you must not be programming
they must not be programming	I must not have programmed
you must not have programmed
he must not have programmed
we must not have programmed
you must not have programmed
they must not have programmed	I must not have been programming
you must not have been programming
he must not have been programming
we must not have been programming
you must not have been programming
they must not have been programming	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I program?
must you program?
must he program?
must we program?
must you program?
must they program? 	must I be programming?
must you be programming?
must he be programming?
must we be programming?
must you be programming?
must they be programming? 	must I have programmed?
must you have programmed?
must he have programmed?
must we have programmed?
must you have programmed?
must they have programmed? 	must I have been programming?
must you have been programming?
must he have been programming?
must we have been programming?
must you have been programming?
must they have been programming? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not program?
must you not program?
must he not program?
must we not program?
must you not program?
must they not program? 	must I not be programming?
must you not be programming?
must he not be programming?
must we not be programming?
must you not be programming?
must they not be programming? 	must I not have programmed?
must you not have programmed?
must he not have programmed?
must we not have programmed?
must you not have programmed?
must they not have programmed? 	must I not have been programming?
must you not have been programming?
must he not have been programming?
must we not have been programming?
must you not have been programming?
must they not have been programming?