I must regress you must regress she must regress we must regress you must regress they must regress
Forma com V-ing
I must be regressing you must be regressing she must be regressing we must be regressing you must be regressing they must be regressing
Perfeito
I must have regressed you must have regressed she must have regressed we must have regressed you must have regressed they must have regressed
Perfeito com V-ing
I must have been regressing you must have been regressing she must have been regressing we must have been regressing you must have been regressing they must have been regressing
Negação
Forma simple
I mustn't regress you mustn't regress she mustn't regress we mustn't regress you mustn't regress they mustn't regress
Forma com V-ing
I mustn't be regressing you mustn't be regressing she mustn't be regressing we mustn't be regressing you mustn't be regressing they mustn't be regressing
Perfeito
I mustn't have regressed you mustn't have regressed she mustn't have regressed we mustn't have regressed you mustn't have regressed they mustn't have regressed
Perfeito com V-ing
I mustn't have been regressing you mustn't have been regressing she mustn't have been regressing we mustn't have been regressing you mustn't have been regressing they mustn't have been regressing
Forma interrogativa
Forma simple
must I regress? must you regress? must she regress? must we regress? must you regress? must they regress?
Forma com V-ing
must I be regressing? must you be regressing? must she be regressing? must we be regressing? must you be regressing? must they be regressing?
Perfeito
must I have regressed? must you have regressed? must she have regressed? must we have regressed? must you have regressed? must they have regressed?
Perfeito com V-ing
must I have been regressing? must you have been regressing? must she have been regressing? must we have been regressing? must you have been regressing? must they have been regressing?
Forma interro-Negação
Forma simple
mustn't I regress? mustn't you regress? mustn't she regress? mustn't we regress? mustn't you regress? mustn't they regress?
Forma com V-ing
mustn't I be regressing? mustn't you be regressing? mustn't she be regressing? mustn't we be regressing? mustn't you be regressing? mustn't they be regressing?
Perfeito
mustn't I have regressed? mustn't you have regressed? mustn't she have regressed? mustn't we have regressed? mustn't you have regressed? mustn't they have regressed?
Perfeito com V-ing
mustn't I have been regressing? mustn't you have been regressing? mustn't she have been regressing? mustn't we have been regressing? mustn't you have been regressing? mustn't they have been regressing?