must constrict
Verbo regular: constrict - constricted- constricted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must constrict
you must constrict
he must constrict
we must constrict
you must constrict
they must constrict 	I must be constricting
you must be constricting
he must be constricting
we must be constricting
you must be constricting
they must be constricting	I must have constricted
you must have constricted
he must have constricted
we must have constricted
you must have constricted
they must have constricted	I must have been constricting
you must have been constricting
he must have been constricting
we must have been constricting
you must have been constricting
they must have been constricting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't constrict
you mustn't constrict
he mustn't constrict
we mustn't constrict
you mustn't constrict
they mustn't constrict 	I mustn't be constricting
you mustn't be constricting
he mustn't be constricting
we mustn't be constricting
you mustn't be constricting
they mustn't be constricting	I mustn't have constricted
you mustn't have constricted
he mustn't have constricted
we mustn't have constricted
you mustn't have constricted
they mustn't have constricted	I mustn't have been constricting
you mustn't have been constricting
he mustn't have been constricting
we mustn't have been constricting
you mustn't have been constricting
they mustn't have been constricting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I constrict?
must you constrict?
must he constrict?
must we constrict?
must you constrict?
must they constrict? 	must I be constricting?
must you be constricting?
must he be constricting?
must we be constricting?
must you be constricting?
must they be constricting? 	must I have constricted?
must you have constricted?
must he have constricted?
must we have constricted?
must you have constricted?
must they have constricted? 	must I have been constricting?
must you have been constricting?
must he have been constricting?
must we have been constricting?
must you have been constricting?
must they have been constricting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I constrict?
mustn't you constrict?
mustn't he constrict?
mustn't we constrict?
mustn't you constrict?
mustn't they constrict? 	mustn't I be constricting?
mustn't you be constricting?
mustn't he be constricting?
mustn't we be constricting?
mustn't you be constricting?
mustn't they be constricting? 	mustn't I have constricted?
mustn't you have constricted?
mustn't he have constricted?
mustn't we have constricted?
mustn't you have constricted?
mustn't they have constricted? 	mustn't I have been constricting?
mustn't you have been constricting?
mustn't he have been constricting?
mustn't we have been constricting?
mustn't you have been constricting?
mustn't they have been constricting?