Atención, este verbo puede no existir, se da como ejemplo la conjugación.
Afirmación
Forma simple
I must stay up you must stay up he must stay up we must stay up you must stay up they must stay up
Forma con V-ing
I must be stay uping you must be stay uping he must be stay uping we must be stay uping you must be stay uping they must be stay uping
Perfecto
I must have stay uped you must have stay uped he must have stay uped we must have stay uped you must have stay uped they must have stay uped
Perfecto con V-ing
I must have been stay uping you must have been stay uping he must have been stay uping we must have been stay uping you must have been stay uping they must have been stay uping
Negación
Forma simple
I mustn't stay up you mustn't stay up he mustn't stay up we mustn't stay up you mustn't stay up they mustn't stay up
Forma con V-ing
I mustn't be stay uping you mustn't be stay uping he mustn't be stay uping we mustn't be stay uping you mustn't be stay uping they mustn't be stay uping
Perfecto
I mustn't have stay uped you mustn't have stay uped he mustn't have stay uped we mustn't have stay uped you mustn't have stay uped they mustn't have stay uped
Perfecto con V-ing
I mustn't have been stay uping you mustn't have been stay uping he mustn't have been stay uping we mustn't have been stay uping you mustn't have been stay uping they mustn't have been stay uping
Forma interrogativa
Forma simple
must I stay up? must you stay up? must he stay up? must we stay up? must you stay up? must they stay up?
Forma con V-ing
must I be stay uping? must you be stay uping? must he be stay uping? must we be stay uping? must you be stay uping? must they be stay uping?
Perfecto
must I have stay uped? must you have stay uped? must he have stay uped? must we have stay uped? must you have stay uped? must they have stay uped?
Perfecto con V-ing
must I have been stay uping? must you have been stay uping? must he have been stay uping? must we have been stay uping? must you have been stay uping? must they have been stay uping?
Forma interro-negativa
Forma simple
mustn't I stay up? mustn't you stay up? mustn't he stay up? mustn't we stay up? mustn't you stay up? mustn't they stay up?
Forma con V-ing
mustn't I be stay uping? mustn't you be stay uping? mustn't he be stay uping? mustn't we be stay uping? mustn't you be stay uping? mustn't they be stay uping?
Perfecto
mustn't I have stay uped? mustn't you have stay uped? mustn't he have stay uped? mustn't we have stay uped? mustn't you have stay uped? mustn't they have stay uped?
Perfecto con V-ing
mustn't I have been stay uping? mustn't you have been stay uping? mustn't he have been stay uping? mustn't we have been stay uping? mustn't you have been stay uping? mustn't they have been stay uping?