must press
Verbo regular: press - pressed- pressed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must press
you must press
he must press
we must press
you must press
they must press 	I must be pressing
you must be pressing
he must be pressing
we must be pressing
you must be pressing
they must be pressing	I must have pressed
you must have pressed
he must have pressed
we must have pressed
you must have pressed
they must have pressed	I must have been pressing
you must have been pressing
he must have been pressing
we must have been pressing
you must have been pressing
they must have been pressing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't press
you mustn't press
he mustn't press
we mustn't press
you mustn't press
they mustn't press 	I mustn't be pressing
you mustn't be pressing
he mustn't be pressing
we mustn't be pressing
you mustn't be pressing
they mustn't be pressing	I mustn't have pressed
you mustn't have pressed
he mustn't have pressed
we mustn't have pressed
you mustn't have pressed
they mustn't have pressed	I mustn't have been pressing
you mustn't have been pressing
he mustn't have been pressing
we mustn't have been pressing
you mustn't have been pressing
they mustn't have been pressing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I press?
must you press?
must he press?
must we press?
must you press?
must they press? 	must I be pressing?
must you be pressing?
must he be pressing?
must we be pressing?
must you be pressing?
must they be pressing? 	must I have pressed?
must you have pressed?
must he have pressed?
must we have pressed?
must you have pressed?
must they have pressed? 	must I have been pressing?
must you have been pressing?
must he have been pressing?
must we have been pressing?
must you have been pressing?
must they have been pressing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I press?
mustn't you press?
mustn't he press?
mustn't we press?
mustn't you press?
mustn't they press? 	mustn't I be pressing?
mustn't you be pressing?
mustn't he be pressing?
mustn't we be pressing?
mustn't you be pressing?
mustn't they be pressing? 	mustn't I have pressed?
mustn't you have pressed?
mustn't he have pressed?
mustn't we have pressed?
mustn't you have pressed?
mustn't they have pressed? 	mustn't I have been pressing?
mustn't you have been pressing?
mustn't he have been pressing?
mustn't we have been pressing?
mustn't you have been pressing?
mustn't they have been pressing?