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