I could out you could out he could out we could out you could out they could out
V-ing form
I could be outing you could be outing he could be outing we could be outing you could be outing they could be outing
Perfect
I could have outed you could have outed he 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 he could have been outing we could have been outing you could have been outing they could have been outing
Negation
Simple form
I couldn't out you couldn't out he couldn't out we couldn't out you couldn't out they couldn't out
V-ing form
I couldn't be outing you couldn't be outing he couldn't be outing we couldn't be outing you couldn't be outing they couldn't be outing
Perfect
I couldn't have outed you couldn't have outed he couldn't have outed we couldn't have outed you couldn't have outed they couldn't have outed
V-ing perfect
I couldn't have been outing you couldn't have been outing he couldn't have been outing we couldn't have been outing you couldn't have been outing they couldn't have been outing
Interrogative form
Simple form
could I out? could you out? could he out? could we out? could you out? could they out?
V-ing form
could I be outing? could you be outing? could he be outing? could we be outing? could you be outing? could they be outing?
Perfect
could I have outed? could you have outed? could he 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 he have been outing? could we have been outing? could you have been outing? could they have been outing?
Interro-negative form
Simple form
couldn't I out? couldn't you out? couldn't he out? couldn't we out? couldn't you out? couldn't they out?
V-ing form
couldn't I be outing? couldn't you be outing? couldn't he be outing? couldn't we be outing? couldn't you be outing? couldn't they be outing?
Perfect
couldn't I have outed? couldn't you have outed? couldn't he have outed? couldn't we have outed? couldn't you have outed? couldn't they have outed?
V-ing perfect
couldn't I have been outing? couldn't you have been outing? couldn't he have been outing? couldn't we have been outing? couldn't you have been outing? couldn't they have been outing?