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