I must stay you must stay he must stay we must stay you must stay they must stay
Forma con V-ing
I must be staying you must be staying he must be staying we must be staying you must be staying they must be staying
Perfecto
I must have stayed you must have stayed he must have stayed we must have stayed you must have stayed they must have stayed
Perfecto con V-ing
I must have been staying you must have been staying he must have been staying we must have been staying you must have been staying they must have been staying
Negación
Forma simple
I mustn't stay you mustn't stay he mustn't stay we mustn't stay you mustn't stay they mustn't stay
Forma con V-ing
I mustn't be staying you mustn't be staying he mustn't be staying we mustn't be staying you mustn't be staying they mustn't be staying
Perfecto
I mustn't have stayed you mustn't have stayed he mustn't have stayed we mustn't have stayed you mustn't have stayed they mustn't have stayed
Perfecto con V-ing
I mustn't have been staying you mustn't have been staying he mustn't have been staying we mustn't have been staying you mustn't have been staying they mustn't have been staying
Forma interrogativa
Forma simple
must I stay? must you stay? must he stay? must we stay? must you stay? must they stay?
Forma con V-ing
must I be staying? must you be staying? must he be staying? must we be staying? must you be staying? must they be staying?
Perfecto
must I have stayed? must you have stayed? must he have stayed? must we have stayed? must you have stayed? must they have stayed?
Perfecto con V-ing
must I have been staying? must you have been staying? must he have been staying? must we have been staying? must you have been staying? must they have been staying?
Forma interro-negativa
Forma simple
mustn't I stay? mustn't you stay? mustn't he stay? mustn't we stay? mustn't you stay? mustn't they stay?
Forma con V-ing
mustn't I be staying? mustn't you be staying? mustn't he be staying? mustn't we be staying? mustn't you be staying? mustn't they be staying?
Perfecto
mustn't I have stayed? mustn't you have stayed? mustn't he have stayed? mustn't we have stayed? mustn't you have stayed? mustn't they have stayed?
Perfecto con V-ing
mustn't I have been staying? mustn't you have been staying? mustn't he have been staying? mustn't we have been staying? mustn't you have been staying? mustn't they have been staying?