I must bark you must bark she must bark we must bark you must bark they must bark
Forma con V-ing
I must be barking you must be barking she must be barking we must be barking you must be barking they must be barking
Perfecto
I must have barked you must have barked she 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 she 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 she 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 she 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 she 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 she 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 she bark? must we bark? must you bark? must they bark?
Forma con V-ing
must I be barking? must you be barking? must she be barking? must we be barking? must you be barking? must they be barking?
Perfecto
must I have barked? must you have barked? must she 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 she 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 she 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 she 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 she 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 she have been barking? mustn't we have been barking? mustn't you have been barking? mustn't they have been barking?