I could bluff you could bluff he could bluff we could bluff you could bluff they could bluff
V-ing form
I could be bluffing you could be bluffing he could be bluffing we could be bluffing you could be bluffing they could be bluffing
Perfect
I could have bluffed you could have bluffed he could have bluffed we could have bluffed you could have bluffed they could have bluffed
V-ing perfect
I could have been bluffing you could have been bluffing he could have been bluffing we could have been bluffing you could have been bluffing they could have been bluffing
Negation
Simple form
I could not bluff you could not bluff he could not bluff we could not bluff you could not bluff they could not bluff
V-ing form
I could not be bluffing you could not be bluffing he could not be bluffing we could not be bluffing you could not be bluffing they could not be bluffing
Perfect
I could not have bluffed you could not have bluffed he could not have bluffed we could not have bluffed you could not have bluffed they could not have bluffed
V-ing perfect
I could not have been bluffing you could not have been bluffing he could not have been bluffing we could not have been bluffing you could not have been bluffing they could not have been bluffing
Interrogative form
Simple form
could I bluff? could you bluff? could he bluff? could we bluff? could you bluff? could they bluff?
V-ing form
could I be bluffing? could you be bluffing? could he be bluffing? could we be bluffing? could you be bluffing? could they be bluffing?
Perfect
could I have bluffed? could you have bluffed? could he have bluffed? could we have bluffed? could you have bluffed? could they have bluffed?
V-ing perfect
could I have been bluffing? could you have been bluffing? could he have been bluffing? could we have been bluffing? could you have been bluffing? could they have been bluffing?
Interro-negative form
Simple form
could I not bluff? could you not bluff? could he not bluff? could we not bluff? could you not bluff? could they not bluff?
V-ing form
could I not be bluffing? could you not be bluffing? could he not be bluffing? could we not be bluffing? could you not be bluffing? could they not be bluffing?
Perfect
could I not have bluffed? could you not have bluffed? could he not have bluffed? could we not have bluffed? could you not have bluffed? could they not have bluffed?
V-ing perfect
could I not have been bluffing? could you not have been bluffing? could he not have been bluffing? could we not have been bluffing? could you not have been bluffing? could they not have been bluffing?