I must bar you must bar she must bar we must bar you must bar they must bar
Forma con V-ing
I must be barring you must be barring she must be barring we must be barring you must be barring they must be barring
Perfecto
I must have barred you must have barred she 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 she must have been barring we must have been barring you must have been barring they must have been barring
Negación
Forma simple
I must not bar you must not bar she must not bar we must not bar you must not bar they must not bar
Forma con V-ing
I must not be barring you must not be barring she must not be barring we must not be barring you must not be barring they must not be barring
Perfecto
I must not have barred you must not have barred she must not have barred we must not have barred you must not have barred they must not have barred
Perfecto con V-ing
I must not have been barring you must not have been barring she must not have been barring we must not have been barring you must not have been barring they must not have been barring
Forma interrogativa
Forma simple
must I bar? must you bar? must she bar? must we bar? must you bar? must they bar?
Forma con V-ing
must I be barring? must you be barring? must she be barring? must we be barring? must you be barring? must they be barring?
Perfecto
must I have barred? must you have barred? must she 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 she have been barring? must we have been barring? must you have been barring? must they have been barring?
Forma interro-negativa
Forma simple
must I not bar? must you not bar? must she not bar? must we not bar? must you not bar? must they not bar?
Forma con V-ing
must I not be barring? must you not be barring? must she not be barring? must we not be barring? must you not be barring? must they not be barring?
Perfecto
must I not have barred? must you not have barred? must she not have barred? must we not have barred? must you not have barred? must they not have barred?
Perfecto con V-ing
must I not have been barring? must you not have been barring? must she not have been barring? must we not have been barring? must you not have been barring? must they not have been barring?