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