could subcategorize
Regular verb: subcategorize - subcategorized- subcategorized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could subcategorize
you could subcategorize
he could subcategorize
we could subcategorize
you could subcategorize
they could subcategorize 	I could be subcategorizing
you could be subcategorizing
he could be subcategorizing
we could be subcategorizing
you could be subcategorizing
they could be subcategorizing	I could have subcategorized
you could have subcategorized
he could have subcategorized
we could have subcategorized
you could have subcategorized
they could have subcategorized	I could have been subcategorizing
you could have been subcategorizing
he could have been subcategorizing
we could have been subcategorizing
you could have been subcategorizing
they could have been subcategorizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not subcategorize
you could not subcategorize
he could not subcategorize
we could not subcategorize
you could not subcategorize
they could not subcategorize 	I could not be subcategorizing
you could not be subcategorizing
he could not be subcategorizing
we could not be subcategorizing
you could not be subcategorizing
they could not be subcategorizing	I could not have subcategorized
you could not have subcategorized
he could not have subcategorized
we could not have subcategorized
you could not have subcategorized
they could not have subcategorized	I could not have been subcategorizing
you could not have been subcategorizing
he could not have been subcategorizing
we could not have been subcategorizing
you could not have been subcategorizing
they could not have been subcategorizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I subcategorize?
could you subcategorize?
could he subcategorize?
could we subcategorize?
could you subcategorize?
could they subcategorize? 	could I be subcategorizing?
could you be subcategorizing?
could he be subcategorizing?
could we be subcategorizing?
could you be subcategorizing?
could they be subcategorizing? 	could I have subcategorized?
could you have subcategorized?
could he have subcategorized?
could we have subcategorized?
could you have subcategorized?
could they have subcategorized? 	could I have been subcategorizing?
could you have been subcategorizing?
could he have been subcategorizing?
could we have been subcategorizing?
could you have been subcategorizing?
could they have been subcategorizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not subcategorize?
could you not subcategorize?
could he not subcategorize?
could we not subcategorize?
could you not subcategorize?
could they not subcategorize? 	could I not be subcategorizing?
could you not be subcategorizing?
could he not be subcategorizing?
could we not be subcategorizing?
could you not be subcategorizing?
could they not be subcategorizing? 	could I not have subcategorized?
could you not have subcategorized?
could he not have subcategorized?
could we not have subcategorized?
could you not have subcategorized?
could they not have subcategorized? 	could I not have been subcategorizing?
could you not have been subcategorizing?
could he not have been subcategorizing?
could we not have been subcategorizing?
could you not have been subcategorizing?
could they not have been subcategorizing?