I could colorize you could colorize she could colorize we could colorize you could colorize they could colorize
V-ing form
I could be colorizing you could be colorizing she could be colorizing we could be colorizing you could be colorizing they could be colorizing
Perfect
I could have colorized you could have colorized she could have colorized we could have colorized you could have colorized they could have colorized
V-ing perfect
I could have been colorizing you could have been colorizing she could have been colorizing we could have been colorizing you could have been colorizing they could have been colorizing
Negation
Simple form
I could not colorize you could not colorize she could not colorize we could not colorize you could not colorize they could not colorize
V-ing form
I could not be colorizing you could not be colorizing she could not be colorizing we could not be colorizing you could not be colorizing they could not be colorizing
Perfect
I could not have colorized you could not have colorized she could not have colorized we could not have colorized you could not have colorized they could not have colorized
V-ing perfect
I could not have been colorizing you could not have been colorizing she could not have been colorizing we could not have been colorizing you could not have been colorizing they could not have been colorizing
Interrogative form
Simple form
could I colorize? could you colorize? could she colorize? could we colorize? could you colorize? could they colorize?
V-ing form
could I be colorizing? could you be colorizing? could she be colorizing? could we be colorizing? could you be colorizing? could they be colorizing?
Perfect
could I have colorized? could you have colorized? could she have colorized? could we have colorized? could you have colorized? could they have colorized?
V-ing perfect
could I have been colorizing? could you have been colorizing? could she have been colorizing? could we have been colorizing? could you have been colorizing? could they have been colorizing?
Interro-negative form
Simple form
could I not colorize? could you not colorize? could she not colorize? could we not colorize? could you not colorize? could they not colorize?
V-ing form
could I not be colorizing? could you not be colorizing? could she not be colorizing? could we not be colorizing? could you not be colorizing? could they not be colorizing?
Perfect
could I not have colorized? could you not have colorized? could she not have colorized? could we not have colorized? could you not have colorized? could they not have colorized?
V-ing perfect
could I not have been colorizing? could you not have been colorizing? could she not have been colorizing? could we not have been colorizing? could you not have been colorizing? could they not have been colorizing?