I must barber you must barber he must barber we must barber you must barber they must barber
Forma con V-ing
I must be barbering you must be barbering he must be barbering we must be barbering you must be barbering they must be barbering
Perfecto
I must have barbered you must have barbered he must have barbered we must have barbered you must have barbered they must have barbered
Perfecto con V-ing
I must have been barbering you must have been barbering he must have been barbering we must have been barbering you must have been barbering they must have been barbering
Negación
Forma simple
I must not barber you must not barber he must not barber we must not barber you must not barber they must not barber
Forma con V-ing
I must not be barbering you must not be barbering he must not be barbering we must not be barbering you must not be barbering they must not be barbering
Perfecto
I must not have barbered you must not have barbered he must not have barbered we must not have barbered you must not have barbered they must not have barbered
Perfecto con V-ing
I must not have been barbering you must not have been barbering he must not have been barbering we must not have been barbering you must not have been barbering they must not have been barbering
Forma interrogativa
Forma simple
must I barber? must you barber? must he barber? must we barber? must you barber? must they barber?
Forma con V-ing
must I be barbering? must you be barbering? must he be barbering? must we be barbering? must you be barbering? must they be barbering?
Perfecto
must I have barbered? must you have barbered? must he have barbered? must we have barbered? must you have barbered? must they have barbered?
Perfecto con V-ing
must I have been barbering? must you have been barbering? must he have been barbering? must we have been barbering? must you have been barbering? must they have been barbering?
Forma interro-negativa
Forma simple
must I not barber? must you not barber? must he not barber? must we not barber? must you not barber? must they not barber?
Forma con V-ing
must I not be barbering? must you not be barbering? must he not be barbering? must we not be barbering? must you not be barbering? must they not be barbering?
Perfecto
must I not have barbered? must you not have barbered? must he not have barbered? must we not have barbered? must you not have barbered? must they not have barbered?
Perfecto con V-ing
must I not have been barbering? must you not have been barbering? must he not have been barbering? must we not have been barbering? must you not have been barbering? must they not have been barbering?