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