I must barber you must barber he must barber we must barber you must barber they must barber
Forme en V-ing
I must be barbering you must be barbering he must be barbering we must be barbering you must be barbering they must be barbering
Perfect
I must have barbered you must have barbered he must have barbered we must have barbered you must have barbered they must have barbered
Perfect en V-ing
I must have been barbering you must have been barbering he must have been barbering we must have been barbering you must have been barbering they must have been barbering
Négation
Forme simple
I mustn't barber you mustn't barber he mustn't barber we mustn't barber you mustn't barber they mustn't barber
Forme en V-ing
I mustn't be barbering you mustn't be barbering he mustn't be barbering we mustn't be barbering you mustn't be barbering they mustn't be barbering
Perfect
I mustn't have barbered you mustn't have barbered he mustn't have barbered we mustn't have barbered you mustn't have barbered they mustn't have barbered
Perfect en V-ing
I mustn't have been barbering you mustn't have been barbering he mustn't have been barbering we mustn't have been barbering you mustn't have been barbering they mustn't have been barbering
Forme interrogative
Forme simple
must I barber? must you barber? must he barber? must we barber? must you barber? must they barber?
Forme en V-ing
must I be barbering? must you be barbering? must he be barbering? must we be barbering? must you be barbering? must they be barbering?
Perfect
must I have barbered? must you have barbered? must he have barbered? must we have barbered? must you have barbered? must they have barbered?
Perfect en V-ing
must I have been barbering? must you have been barbering? must he have been barbering? must we have been barbering? must you have been barbering? must they have been barbering?
Forme interro-négative
Forme simple
mustn't I barber? mustn't you barber? mustn't he barber? mustn't we barber? mustn't you barber? mustn't they barber?
Forme en V-ing
mustn't I be barbering? mustn't you be barbering? mustn't he be barbering? mustn't we be barbering? mustn't you be barbering? mustn't they be barbering?
Perfect
mustn't I have barbered? mustn't you have barbered? mustn't he have barbered? mustn't we have barbered? mustn't you have barbered? mustn't they have barbered?
Perfect en V-ing
mustn't I have been barbering? mustn't you have been barbering? mustn't he have been barbering? mustn't we have been barbering? mustn't you have been barbering? mustn't they have been barbering?