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