I must pose you must pose he must pose we must pose you must pose they must pose
V-ing form
I must be posing you must be posing he must be posing we must be posing you must be posing they must be posing
Perfect
I must have posed you must have posed he must have posed we must have posed you must have posed they must have posed
V-ing perfect
I must have been posing you must have been posing he must have been posing we must have been posing you must have been posing they must have been posing
Negation
Simple form
I mustn't pose you mustn't pose he mustn't pose we mustn't pose you mustn't pose they mustn't pose
V-ing form
I mustn't be posing you mustn't be posing he mustn't be posing we mustn't be posing you mustn't be posing they mustn't be posing
Perfect
I mustn't have posed you mustn't have posed he mustn't have posed we mustn't have posed you mustn't have posed they mustn't have posed
V-ing perfect
I mustn't have been posing you mustn't have been posing he mustn't have been posing we mustn't have been posing you mustn't have been posing they mustn't have been posing
Interrogative form
Simple form
must I pose? must you pose? must he pose? must we pose? must you pose? must they pose?
V-ing form
must I be posing? must you be posing? must he be posing? must we be posing? must you be posing? must they be posing?
Perfect
must I have posed? must you have posed? must he have posed? must we have posed? must you have posed? must they have posed?
V-ing perfect
must I have been posing? must you have been posing? must he have been posing? must we have been posing? must you have been posing? must they have been posing?
Interro-negative form
Simple form
mustn't I pose? mustn't you pose? mustn't he pose? mustn't we pose? mustn't you pose? mustn't they pose?
V-ing form
mustn't I be posing? mustn't you be posing? mustn't he be posing? mustn't we be posing? mustn't you be posing? mustn't they be posing?
Perfect
mustn't I have posed? mustn't you have posed? mustn't he have posed? mustn't we have posed? mustn't you have posed? mustn't they have posed?
V-ing perfect
mustn't I have been posing? mustn't you have been posing? mustn't he have been posing? mustn't we have been posing? mustn't you have been posing? mustn't they have been posing?