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