English verb conjugation
COULD SUBCATEGORIZE

Regular verb: subcategorize - subcategorized - subcategorized

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I couldn't subcategorize you couldn't subcategorize he couldn't subcategorize we couldn't subcategorize you couldn't subcategorize they couldn't subcategorize	I couldn't be subcategorizing you couldn't be subcategorizing he couldn't be subcategorizing we couldn't be subcategorizing you couldn't be subcategorizing they couldn't be subcategorizing
Perfect	V-ing perfect
I couldn't have subcategorized you couldn't have subcategorized he couldn't have subcategorized we couldn't have subcategorized you couldn't have subcategorized they couldn't have subcategorized	I couldn't have been subcategorizing you couldn't have been subcategorizing he couldn't have been subcategorizing we couldn't have been subcategorizing you couldn't have been subcategorizing they couldn't have been subcategorizing

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
couldn't I subcategorize? couldn't you subcategorize? couldn't he subcategorize? couldn't we subcategorize? couldn't you subcategorize? couldn't they subcategorize?	couldn't I be subcategorizing? couldn't you be subcategorizing? couldn't he be subcategorizing? couldn't we be subcategorizing? couldn't you be subcategorizing? couldn't they be subcategorizing?
Perfect	V-ing perfect
couldn't I have subcategorized? couldn't you have subcategorized? couldn't he have subcategorized? couldn't we have subcategorized? couldn't you have subcategorized? couldn't they have subcategorized?	couldn't I have been subcategorizing? couldn't you have been subcategorizing? couldn't he have been subcategorizing? couldn't we have been subcategorizing? couldn't you have been subcategorizing? couldn't they have been subcategorizing?