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