I must comb you must comb she must comb we must comb you must comb they must comb
Forma con V-ing
I must be combing you must be combing she must be combing we must be combing you must be combing they must be combing
Perfecto
I must have combed you must have combed she must have combed we must have combed you must have combed they must have combed
Perfecto con V-ing
I must have been combing you must have been combing she must have been combing we must have been combing you must have been combing they must have been combing
Negación
Forma simple
I mustn't comb you mustn't comb she mustn't comb we mustn't comb you mustn't comb they mustn't comb
Forma con V-ing
I mustn't be combing you mustn't be combing she mustn't be combing we mustn't be combing you mustn't be combing they mustn't be combing
Perfecto
I mustn't have combed you mustn't have combed she mustn't have combed we mustn't have combed you mustn't have combed they mustn't have combed
Perfecto con V-ing
I mustn't have been combing you mustn't have been combing she mustn't have been combing we mustn't have been combing you mustn't have been combing they mustn't have been combing
Forma interrogativa
Forma simple
must I comb? must you comb? must she comb? must we comb? must you comb? must they comb?
Forma con V-ing
must I be combing? must you be combing? must she be combing? must we be combing? must you be combing? must they be combing?
Perfecto
must I have combed? must you have combed? must she have combed? must we have combed? must you have combed? must they have combed?
Perfecto con V-ing
must I have been combing? must you have been combing? must she have been combing? must we have been combing? must you have been combing? must they have been combing?
Forma interro-negativa
Forma simple
mustn't I comb? mustn't you comb? mustn't she comb? mustn't we comb? mustn't you comb? mustn't they comb?
Forma con V-ing
mustn't I be combing? mustn't you be combing? mustn't she be combing? mustn't we be combing? mustn't you be combing? mustn't they be combing?
Perfecto
mustn't I have combed? mustn't you have combed? mustn't she have combed? mustn't we have combed? mustn't you have combed? mustn't they have combed?
Perfecto con V-ing
mustn't I have been combing? mustn't you have been combing? mustn't she have been combing? mustn't we have been combing? mustn't you have been combing? mustn't they have been combing?