must standardize
Regular verb: standardize - standardized- standardized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not standardize
you must not standardize
he must not standardize
we must not standardize
you must not standardize
they must not standardize 	I must not be standardizing
you must not be standardizing
he must not be standardizing
we must not be standardizing
you must not be standardizing
they must not be standardizing	I must not have standardized
you must not have standardized
he must not have standardized
we must not have standardized
you must not have standardized
they must not have standardized	I must not have been standardizing
you must not have been standardizing
he must not have been standardizing
we must not have been standardizing
you must not have been standardizing
they must not have been standardizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not standardize?
must you not standardize?
must he not standardize?
must we not standardize?
must you not standardize?
must they not standardize? 	must I not be standardizing?
must you not be standardizing?
must he not be standardizing?
must we not be standardizing?
must you not be standardizing?
must they not be standardizing? 	must I not have standardized?
must you not have standardized?
must he not have standardized?
must we not have standardized?
must you not have standardized?
must they not have standardized? 	must I not have been standardizing?
must you not have been standardizing?
must he not have been standardizing?
must we not have been standardizing?
must you not have been standardizing?
must they not have been standardizing?