I must commence you must commence she must commence we must commence you must commence they must commence
Forme en V-ing
I must be commencing you must be commencing she must be commencing we must be commencing you must be commencing they must be commencing
Perfect
I must have commenced you must have commenced she must have commenced we must have commenced you must have commenced they must have commenced
Perfect en V-ing
I must have been commencing you must have been commencing she must have been commencing we must have been commencing you must have been commencing they must have been commencing
Négation
Forme simple
I mustn't commence you mustn't commence she mustn't commence we mustn't commence you mustn't commence they mustn't commence
Forme en V-ing
I mustn't be commencing you mustn't be commencing she mustn't be commencing we mustn't be commencing you mustn't be commencing they mustn't be commencing
Perfect
I mustn't have commenced you mustn't have commenced she mustn't have commenced we mustn't have commenced you mustn't have commenced they mustn't have commenced
Perfect en V-ing
I mustn't have been commencing you mustn't have been commencing she mustn't have been commencing we mustn't have been commencing you mustn't have been commencing they mustn't have been commencing
Forme interrogative
Forme simple
must I commence? must you commence? must she commence? must we commence? must you commence? must they commence?
Forme en V-ing
must I be commencing? must you be commencing? must she be commencing? must we be commencing? must you be commencing? must they be commencing?
Perfect
must I have commenced? must you have commenced? must she have commenced? must we have commenced? must you have commenced? must they have commenced?
Perfect en V-ing
must I have been commencing? must you have been commencing? must she have been commencing? must we have been commencing? must you have been commencing? must they have been commencing?
Forme interro-négative
Forme simple
mustn't I commence? mustn't you commence? mustn't she commence? mustn't we commence? mustn't you commence? mustn't they commence?
Forme en V-ing
mustn't I be commencing? mustn't you be commencing? mustn't she be commencing? mustn't we be commencing? mustn't you be commencing? mustn't they be commencing?
Perfect
mustn't I have commenced? mustn't you have commenced? mustn't she have commenced? mustn't we have commenced? mustn't you have commenced? mustn't they have commenced?
Perfect en V-ing
mustn't I have been commencing? mustn't you have been commencing? mustn't she have been commencing? mustn't we have been commencing? mustn't you have been commencing? mustn't they have been commencing?