I could over you could over he could over we could over you could over they could over
V-ing form
I could be overing you could be overing he could be overing we could be overing you could be overing they could be overing
Perfect
I could have overed you could have overed he could have overed we could have overed you could have overed they could have overed
V-ing perfect
I could have been overing you could have been overing he could have been overing we could have been overing you could have been overing they could have been overing
Negation
Simple form
I could not over you could not over he could not over we could not over you could not over they could not over
V-ing form
I could not be overing you could not be overing he could not be overing we could not be overing you could not be overing they could not be overing
Perfect
I could not have overed you could not have overed he could not have overed we could not have overed you could not have overed they could not have overed
V-ing perfect
I could not have been overing you could not have been overing he could not have been overing we could not have been overing you could not have been overing they could not have been overing
Interrogative form
Simple form
could I over? could you over? could he over? could we over? could you over? could they over?
V-ing form
could I be overing? could you be overing? could he be overing? could we be overing? could you be overing? could they be overing?
Perfect
could I have overed? could you have overed? could he have overed? could we have overed? could you have overed? could they have overed?
V-ing perfect
could I have been overing? could you have been overing? could he have been overing? could we have been overing? could you have been overing? could they have been overing?
Interro-negative form
Simple form
could I not over? could you not over? could he not over? could we not over? could you not over? could they not over?
V-ing form
could I not be overing? could you not be overing? could he not be overing? could we not be overing? could you not be overing? could they not be overing?
Perfect
could I not have overed? could you not have overed? could he not have overed? could we not have overed? could you not have overed? could they not have overed?
V-ing perfect
could I not have been overing? could you not have been overing? could he not have been overing? could we not have been overing? could you not have been overing? could they not have been overing?