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