could standardize
Regular verb: standardize - standardized- standardized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could standardize
you could standardize
she could standardize
we could standardize
you could standardize
they could standardize 	I could be standardizing
you could be standardizing
she could be standardizing
we could be standardizing
you could be standardizing
they could be standardizing	I could have standardized
you could have standardized
she could have standardized
we could have standardized
you could have standardized
they could have standardized	I could have been standardizing
you could have been standardizing
she could have been standardizing
we could have been standardizing
you could have been standardizing
they could have been standardizing	

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

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I standardize?
could you standardize?
could she standardize?
could we standardize?
could you standardize?
could they standardize? 	could I be standardizing?
could you be standardizing?
could she be standardizing?
could we be standardizing?
could you be standardizing?
could they be standardizing? 	could I have standardized?
could you have standardized?
could she have standardized?
could we have standardized?
could you have standardized?
could they have standardized? 	could I have been standardizing?
could you have been standardizing?
could she have been standardizing?
could we have been standardizing?
could you have been standardizing?
could they have been standardizing? 	

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