I could out you could out she could out we could out you could out they could out
V-ing form
I could be outing you could be outing she could be outing we could be outing you could be outing they could be outing
Perfect
I could have outed you could have outed she could have outed we could have outed you could have outed they could have outed
V-ing perfect
I could have been outing you could have been outing she could have been outing we could have been outing you could have been outing they could have been outing
Negation
Simple form
I could not out you could not out she could not out we could not out you could not out they could not out
V-ing form
I could not be outing you could not be outing she could not be outing we could not be outing you could not be outing they could not be outing
Perfect
I could not have outed you could not have outed she could not have outed we could not have outed you could not have outed they could not have outed
V-ing perfect
I could not have been outing you could not have been outing she could not have been outing we could not have been outing you could not have been outing they could not have been outing
Interrogative form
Simple form
could I out? could you out? could she out? could we out? could you out? could they out?
V-ing form
could I be outing? could you be outing? could she be outing? could we be outing? could you be outing? could they be outing?
Perfect
could I have outed? could you have outed? could she have outed? could we have outed? could you have outed? could they have outed?
V-ing perfect
could I have been outing? could you have been outing? could she have been outing? could we have been outing? could you have been outing? could they have been outing?
Interro-negative form
Simple form
could I not out? could you not out? could she not out? could we not out? could you not out? could they not out?
V-ing form
could I not be outing? could you not be outing? could she not be outing? could we not be outing? could you not be outing? could they not be outing?
Perfect
could I not have outed? could you not have outed? could she not have outed? could we not have outed? could you not have outed? could they not have outed?
V-ing perfect
could I not have been outing? could you not have been outing? could she not have been outing? could we not have been outing? could you not have been outing? could they not have been outing?