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