Attention, ce verbe peut ne pas exister, la conjugaison est donnée à titre d'exemple.
Affirmation
Forme simple
I must busy busy you must busy busy he must busy busy we must busy busy you must busy busy they must busy busy
Forme en V-ing
I must be busy busying you must be busy busying he must be busy busying we must be busy busying you must be busy busying they must be busy busying
Perfect
I must have busy busied you must have busy busied he must have busy busied we must have busy busied you must have busy busied they must have busy busied
Perfect en V-ing
I must have been busy busying you must have been busy busying he must have been busy busying we must have been busy busying you must have been busy busying they must have been busy busying
Négation
Forme simple
I mustn't busy busy you mustn't busy busy he mustn't busy busy we mustn't busy busy you mustn't busy busy they mustn't busy busy
Forme en V-ing
I mustn't be busy busying you mustn't be busy busying he mustn't be busy busying we mustn't be busy busying you mustn't be busy busying they mustn't be busy busying
Perfect
I mustn't have busy busied you mustn't have busy busied he mustn't have busy busied we mustn't have busy busied you mustn't have busy busied they mustn't have busy busied
Perfect en V-ing
I mustn't have been busy busying you mustn't have been busy busying he mustn't have been busy busying we mustn't have been busy busying you mustn't have been busy busying they mustn't have been busy busying
Forme interrogative
Forme simple
must I busy busy? must you busy busy? must he busy busy? must we busy busy? must you busy busy? must they busy busy?
Forme en V-ing
must I be busy busying? must you be busy busying? must he be busy busying? must we be busy busying? must you be busy busying? must they be busy busying?
Perfect
must I have busy busied? must you have busy busied? must he have busy busied? must we have busy busied? must you have busy busied? must they have busy busied?
Perfect en V-ing
must I have been busy busying? must you have been busy busying? must he have been busy busying? must we have been busy busying? must you have been busy busying? must they have been busy busying?
Forme interro-négative
Forme simple
mustn't I busy busy? mustn't you busy busy? mustn't he busy busy? mustn't we busy busy? mustn't you busy busy? mustn't they busy busy?
Forme en V-ing
mustn't I be busy busying? mustn't you be busy busying? mustn't he be busy busying? mustn't we be busy busying? mustn't you be busy busying? mustn't they be busy busying?
Perfect
mustn't I have busy busied? mustn't you have busy busied? mustn't he have busy busied? mustn't we have busy busied? mustn't you have busy busied? mustn't they have busy busied?
Perfect en V-ing
mustn't I have been busy busying? mustn't you have been busy busying? mustn't he have been busy busying? mustn't we have been busy busying? mustn't you have been busy busying? mustn't they have been busy busying?