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