English verb conjugation
COULD CHARACTERIZE

Regular verb: characterize - characterized - characterized

Affirmation

Simple form	V-ing form
I could characterize you could characterize he could characterize we could characterize you could characterize they could characterize	I could be characterizing you could be characterizing he could be characterizing we could be characterizing you could be characterizing they could be characterizing
Perfect	V-ing perfect
I could have characterized you could have characterized he could have characterized we could have characterized you could have characterized they could have characterized	I could have been characterizing you could have been characterizing he could have been characterizing we could have been characterizing you could have been characterizing they could have been characterizing

Negation

Simple form	V-ing form
I could not characterize you could not characterize he could not characterize we could not characterize you could not characterize they could not characterize	I could not be characterizing you could not be characterizing he could not be characterizing we could not be characterizing you could not be characterizing they could not be characterizing
Perfect	V-ing perfect
I could not have characterized you could not have characterized he could not have characterized we could not have characterized you could not have characterized they could not have characterized	I could not have been characterizing you could not have been characterizing he could not have been characterizing we could not have been characterizing you could not have been characterizing they could not have been characterizing

Interrogative form

Simple form	V-ing form
could I characterize? could you characterize? could he characterize? could we characterize? could you characterize? could they characterize?	could I be characterizing? could you be characterizing? could he be characterizing? could we be characterizing? could you be characterizing? could they be characterizing?
Perfect	V-ing perfect
could I have characterized? could you have characterized? could he have characterized? could we have characterized? could you have characterized? could they have characterized?	could I have been characterizing? could you have been characterizing? could he have been characterizing? could we have been characterizing? could you have been characterizing? could they have been characterizing?

Interro-negative form

Simple form	V-ing form
could I not characterize? could you not characterize? could he not characterize? could we not characterize? could you not characterize? could they not characterize?	could I not be characterizing? could you not be characterizing? could he not be characterizing? could we not be characterizing? could you not be characterizing? could they not be characterizing?
Perfect	V-ing perfect
could I not have characterized? could you not have characterized? could he not have characterized? could we not have characterized? could you not have characterized? could they not have characterized?	could I not have been characterizing? could you not have been characterizing? could he not have been characterizing? could we not have been characterizing? could you not have been characterizing? could they not have been characterizing?