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