I must undress you must undress she must undress we must undress you must undress they must undress
Forma con V-ing
I must be undressing you must be undressing she must be undressing we must be undressing you must be undressing they must be undressing
Perfecto
I must have undressed you must have undressed she 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 she 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 she 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 she 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 she 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 she 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 she undress? must we undress? must you undress? must they undress?
Forma con V-ing
must I be undressing? must you be undressing? must she be undressing? must we be undressing? must you be undressing? must they be undressing?
Perfecto
must I have undressed? must you have undressed? must she 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 she 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 she 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 she 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 she 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 she have been undressing? mustn't we have been undressing? mustn't you have been undressing? mustn't they have been undressing?