I could bin you could bin she could bin we could bin you could bin they could bin
V-ing form
I could be bining you could be bining she could be bining we could be bining you could be bining they could be bining
Perfect
I could have bined you could have bined she could have bined we could have bined you could have bined they could have bined
V-ing perfect
I could have been bining you could have been bining she could have been bining we could have been bining you could have been bining they could have been bining
Negation
Simple form
I could not bin you could not bin she could not bin we could not bin you could not bin they could not bin
V-ing form
I could not be bining you could not be bining she could not be bining we could not be bining you could not be bining they could not be bining
Perfect
I could not have bined you could not have bined she could not have bined we could not have bined you could not have bined they could not have bined
V-ing perfect
I could not have been bining you could not have been bining she could not have been bining we could not have been bining you could not have been bining they could not have been bining
Interrogative form
Simple form
could I bin? could you bin? could she bin? could we bin? could you bin? could they bin?
V-ing form
could I be bining? could you be bining? could she be bining? could we be bining? could you be bining? could they be bining?
Perfect
could I have bined? could you have bined? could she have bined? could we have bined? could you have bined? could they have bined?
V-ing perfect
could I have been bining? could you have been bining? could she have been bining? could we have been bining? could you have been bining? could they have been bining?
Interro-negative form
Simple form
could I not bin? could you not bin? could she not bin? could we not bin? could you not bin? could they not bin?
V-ing form
could I not be bining? could you not be bining? could she not be bining? could we not be bining? could you not be bining? could they not be bining?
Perfect
could I not have bined? could you not have bined? could she not have bined? could we not have bined? could you not have bined? could they not have bined?
V-ing perfect
could I not have been bining? could you not have been bining? could she not have been bining? could we not have been bining? could you not have been bining? could they not have been bining?