Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could characterize characterize you could characterize characterize she could characterize characterize we could characterize characterize you could characterize characterize they could characterize characterize
V-ing form
I could be characterize characterizing you could be characterize characterizing she could be characterize characterizing we could be characterize characterizing you could be characterize characterizing they could be characterize characterizing
Perfect
I could have characterize characterized you could have characterize characterized she could have characterize characterized we could have characterize characterized you could have characterize characterized they could have characterize characterized
V-ing perfect
I could have been characterize characterizing you could have been characterize characterizing she could have been characterize characterizing we could have been characterize characterizing you could have been characterize characterizing they could have been characterize characterizing
Negation
Simple form
I could not characterize characterize you could not characterize characterize she could not characterize characterize we could not characterize characterize you could not characterize characterize they could not characterize characterize
V-ing form
I could not be characterize characterizing you could not be characterize characterizing she could not be characterize characterizing we could not be characterize characterizing you could not be characterize characterizing they could not be characterize characterizing
Perfect
I could not have characterize characterized you could not have characterize characterized she could not have characterize characterized we could not have characterize characterized you could not have characterize characterized they could not have characterize characterized
V-ing perfect
I could not have been characterize characterizing you could not have been characterize characterizing she could not have been characterize characterizing we could not have been characterize characterizing you could not have been characterize characterizing they could not have been characterize characterizing
Interrogative form
Simple form
could I characterize characterize? could you characterize characterize? could she characterize characterize? could we characterize characterize? could you characterize characterize? could they characterize characterize?
V-ing form
could I be characterize characterizing? could you be characterize characterizing? could she be characterize characterizing? could we be characterize characterizing? could you be characterize characterizing? could they be characterize characterizing?
Perfect
could I have characterize characterized? could you have characterize characterized? could she have characterize characterized? could we have characterize characterized? could you have characterize characterized? could they have characterize characterized?
V-ing perfect
could I have been characterize characterizing? could you have been characterize characterizing? could she have been characterize characterizing? could we have been characterize characterizing? could you have been characterize characterizing? could they have been characterize characterizing?
Interro-negative form
Simple form
could I not characterize characterize? could you not characterize characterize? could she not characterize characterize? could we not characterize characterize? could you not characterize characterize? could they not characterize characterize?
V-ing form
could I not be characterize characterizing? could you not be characterize characterizing? could she not be characterize characterizing? could we not be characterize characterizing? could you not be characterize characterizing? could they not be characterize characterizing?
Perfect
could I not have characterize characterized? could you not have characterize characterized? could she not have characterize characterized? could we not have characterize characterized? could you not have characterize characterized? could they not have characterize characterized?
V-ing perfect
could I not have been characterize characterizing? could you not have been characterize characterizing? could she not have been characterize characterizing? could we not have been characterize characterizing? could you not have been characterize characterizing? could they not have been characterize characterizing?