I must barn you must barn she must barn we must barn you must barn they must barn
Forme en V-ing
I must be barning you must be barning she must be barning we must be barning you must be barning they must be barning
Perfect
I must have barned you must have barned she 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 she must have been barning we must have been barning you must have been barning they must have been barning
Négation
Forme simple
I must not barn you must not barn she must not barn we must not barn you must not barn they must not barn
Forme en V-ing
I must not be barning you must not be barning she must not be barning we must not be barning you must not be barning they must not be barning
Perfect
I must not have barned you must not have barned she must not have barned we must not have barned you must not have barned they must not have barned
Perfect en V-ing
I must not have been barning you must not have been barning she must not have been barning we must not have been barning you must not have been barning they must not have been barning
Forme interrogative
Forme simple
must I barn? must you barn? must she barn? must we barn? must you barn? must they barn?
Forme en V-ing
must I be barning? must you be barning? must she be barning? must we be barning? must you be barning? must they be barning?
Perfect
must I have barned? must you have barned? must she 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 she have been barning? must we have been barning? must you have been barning? must they have been barning?
Forme interro-négative
Forme simple
must I not barn? must you not barn? must she not barn? must we not barn? must you not barn? must they not barn?
Forme en V-ing
must I not be barning? must you not be barning? must she not be barning? must we not be barning? must you not be barning? must they not be barning?
Perfect
must I not have barned? must you not have barned? must she not have barned? must we not have barned? must you not have barned? must they not have barned?
Perfect en V-ing
must I not have been barning? must you not have been barning? must she not have been barning? must we not have been barning? must you not have been barning? must they not have been barning?