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