must standardize
Verbo regular: standardize - standardized- standardized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must standardize
you must standardize
he must standardize
we must standardize
you must standardize
they must standardize 	I must be standardizing
you must be standardizing
he must be standardizing
we must be standardizing
you must be standardizing
they must be standardizing	I must have standardized
you must have standardized
he must have standardized
we must have standardized
you must have standardized
they must have standardized	I must have been standardizing
you must have been standardizing
he must have been standardizing
we must have been standardizing
you must have been standardizing
they must have been standardizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't standardize
you mustn't standardize
he mustn't standardize
we mustn't standardize
you mustn't standardize
they mustn't standardize 	I mustn't be standardizing
you mustn't be standardizing
he mustn't be standardizing
we mustn't be standardizing
you mustn't be standardizing
they mustn't be standardizing	I mustn't have standardized
you mustn't have standardized
he mustn't have standardized
we mustn't have standardized
you mustn't have standardized
they mustn't have standardized	I mustn't have been standardizing
you mustn't have been standardizing
he mustn't have been standardizing
we mustn't have been standardizing
you mustn't have been standardizing
they mustn't have been standardizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I standardize?
must you standardize?
must he standardize?
must we standardize?
must you standardize?
must they standardize? 	must I be standardizing?
must you be standardizing?
must he be standardizing?
must we be standardizing?
must you be standardizing?
must they be standardizing? 	must I have standardized?
must you have standardized?
must he have standardized?
must we have standardized?
must you have standardized?
must they have standardized? 	must I have been standardizing?
must you have been standardizing?
must he have been standardizing?
must we have been standardizing?
must you have been standardizing?
must they have been standardizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I standardize?
mustn't you standardize?
mustn't he standardize?
mustn't we standardize?
mustn't you standardize?
mustn't they standardize? 	mustn't I be standardizing?
mustn't you be standardizing?
mustn't he be standardizing?
mustn't we be standardizing?
mustn't you be standardizing?
mustn't they be standardizing? 	mustn't I have standardized?
mustn't you have standardized?
mustn't he have standardized?
mustn't we have standardized?
mustn't you have standardized?
mustn't they have standardized? 	mustn't I have been standardizing?
mustn't you have been standardizing?
mustn't he have been standardizing?
mustn't we have been standardizing?
mustn't you have been standardizing?
mustn't they have been standardizing?