I must perk you must perk she must perk we must perk you must perk they must perk
Forme en V-ing
I must be perking you must be perking she must be perking we must be perking you must be perking they must be perking
Perfect
I must have perked you must have perked she must have perked we must have perked you must have perked they must have perked
Perfect en V-ing
I must have been perking you must have been perking she must have been perking we must have been perking you must have been perking they must have been perking
Négation
Forme simple
I must not perk you must not perk she must not perk we must not perk you must not perk they must not perk
Forme en V-ing
I must not be perking you must not be perking she must not be perking we must not be perking you must not be perking they must not be perking
Perfect
I must not have perked you must not have perked she must not have perked we must not have perked you must not have perked they must not have perked
Perfect en V-ing
I must not have been perking you must not have been perking she must not have been perking we must not have been perking you must not have been perking they must not have been perking
Forme interrogative
Forme simple
must I perk? must you perk? must she perk? must we perk? must you perk? must they perk?
Forme en V-ing
must I be perking? must you be perking? must she be perking? must we be perking? must you be perking? must they be perking?
Perfect
must I have perked? must you have perked? must she have perked? must we have perked? must you have perked? must they have perked?
Perfect en V-ing
must I have been perking? must you have been perking? must she have been perking? must we have been perking? must you have been perking? must they have been perking?
Forme interro-négative
Forme simple
must I not perk? must you not perk? must she not perk? must we not perk? must you not perk? must they not perk?
Forme en V-ing
must I not be perking? must you not be perking? must she not be perking? must we not be perking? must you not be perking? must they not be perking?
Perfect
must I not have perked? must you not have perked? must she not have perked? must we not have perked? must you not have perked? must they not have perked?
Perfect en V-ing
must I not have been perking? must you not have been perking? must she not have been perking? must we not have been perking? must you not have been perking? must they not have been perking?