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