must preformulate
Verbo regular: preformulate - preformulated- preformulated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must preformulate
you must preformulate
he must preformulate
we must preformulate
you must preformulate
they must preformulate 	I must be preformulating
you must be preformulating
he must be preformulating
we must be preformulating
you must be preformulating
they must be preformulating	I must have preformulated
you must have preformulated
he must have preformulated
we must have preformulated
you must have preformulated
they must have preformulated	I must have been preformulating
you must have been preformulating
he must have been preformulating
we must have been preformulating
you must have been preformulating
they must have been preformulating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't preformulate
you mustn't preformulate
he mustn't preformulate
we mustn't preformulate
you mustn't preformulate
they mustn't preformulate 	I mustn't be preformulating
you mustn't be preformulating
he mustn't be preformulating
we mustn't be preformulating
you mustn't be preformulating
they mustn't be preformulating	I mustn't have preformulated
you mustn't have preformulated
he mustn't have preformulated
we mustn't have preformulated
you mustn't have preformulated
they mustn't have preformulated	I mustn't have been preformulating
you mustn't have been preformulating
he mustn't have been preformulating
we mustn't have been preformulating
you mustn't have been preformulating
they mustn't have been preformulating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I preformulate?
must you preformulate?
must he preformulate?
must we preformulate?
must you preformulate?
must they preformulate? 	must I be preformulating?
must you be preformulating?
must he be preformulating?
must we be preformulating?
must you be preformulating?
must they be preformulating? 	must I have preformulated?
must you have preformulated?
must he have preformulated?
must we have preformulated?
must you have preformulated?
must they have preformulated? 	must I have been preformulating?
must you have been preformulating?
must he have been preformulating?
must we have been preformulating?
must you have been preformulating?
must they have been preformulating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I preformulate?
mustn't you preformulate?
mustn't he preformulate?
mustn't we preformulate?
mustn't you preformulate?
mustn't they preformulate? 	mustn't I be preformulating?
mustn't you be preformulating?
mustn't he be preformulating?
mustn't we be preformulating?
mustn't you be preformulating?
mustn't they be preformulating? 	mustn't I have preformulated?
mustn't you have preformulated?
mustn't he have preformulated?
mustn't we have preformulated?
mustn't you have preformulated?
mustn't they have preformulated? 	mustn't I have been preformulating?
mustn't you have been preformulating?
mustn't he have been preformulating?
mustn't we have been preformulating?
mustn't you have been preformulating?
mustn't they have been preformulating?