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