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