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