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