must characterize
Verbo regular: characterize - characterized- characterized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must characterize
you must characterize
she must characterize
we must characterize
you must characterize
they must characterize 	I must be characterizing
you must be characterizing
she must be characterizing
we must be characterizing
you must be characterizing
they must be characterizing	I must have characterized
you must have characterized
she must have characterized
we must have characterized
you must have characterized
they must have characterized	I must have been characterizing
you must have been characterizing
she must have been characterizing
we must have been characterizing
you must have been characterizing
they must have been characterizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't characterize
you mustn't characterize
she mustn't characterize
we mustn't characterize
you mustn't characterize
they mustn't characterize 	I mustn't be characterizing
you mustn't be characterizing
she mustn't be characterizing
we mustn't be characterizing
you mustn't be characterizing
they mustn't be characterizing	I mustn't have characterized
you mustn't have characterized
she mustn't have characterized
we mustn't have characterized
you mustn't have characterized
they mustn't have characterized	I mustn't have been characterizing
you mustn't have been characterizing
she mustn't have been characterizing
we mustn't have been characterizing
you mustn't have been characterizing
they mustn't have been characterizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I characterize?
must you characterize?
must she characterize?
must we characterize?
must you characterize?
must they characterize? 	must I be characterizing?
must you be characterizing?
must she be characterizing?
must we be characterizing?
must you be characterizing?
must they be characterizing? 	must I have characterized?
must you have characterized?
must she have characterized?
must we have characterized?
must you have characterized?
must they have characterized? 	must I have been characterizing?
must you have been characterizing?
must she have been characterizing?
must we have been characterizing?
must you have been characterizing?
must they have been characterizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I characterize?
mustn't you characterize?
mustn't she characterize?
mustn't we characterize?
mustn't you characterize?
mustn't they characterize? 	mustn't I be characterizing?
mustn't you be characterizing?
mustn't she be characterizing?
mustn't we be characterizing?
mustn't you be characterizing?
mustn't they be characterizing? 	mustn't I have characterized?
mustn't you have characterized?
mustn't she have characterized?
mustn't we have characterized?
mustn't you have characterized?
mustn't they have characterized? 	mustn't I have been characterizing?
mustn't you have been characterizing?
mustn't she have been characterizing?
mustn't we have been characterizing?
mustn't you have been characterizing?
mustn't they have been characterizing?