I must sadden you must sadden he must sadden we must sadden you must sadden they must sadden
Forma con V-ing
I must be saddening you must be saddening he must be saddening we must be saddening you must be saddening they must be saddening
Perfecto
I must have saddened you must have saddened he must have saddened we must have saddened you must have saddened they must have saddened
Perfecto con V-ing
I must have been saddening you must have been saddening he must have been saddening we must have been saddening you must have been saddening they must have been saddening
Negación
Forma simple
I must not sadden you must not sadden he must not sadden we must not sadden you must not sadden they must not sadden
Forma con V-ing
I must not be saddening you must not be saddening he must not be saddening we must not be saddening you must not be saddening they must not be saddening
Perfecto
I must not have saddened you must not have saddened he must not have saddened we must not have saddened you must not have saddened they must not have saddened
Perfecto con V-ing
I must not have been saddening you must not have been saddening he must not have been saddening we must not have been saddening you must not have been saddening they must not have been saddening
Forma interrogativa
Forma simple
must I sadden? must you sadden? must he sadden? must we sadden? must you sadden? must they sadden?
Forma con V-ing
must I be saddening? must you be saddening? must he be saddening? must we be saddening? must you be saddening? must they be saddening?
Perfecto
must I have saddened? must you have saddened? must he have saddened? must we have saddened? must you have saddened? must they have saddened?
Perfecto con V-ing
must I have been saddening? must you have been saddening? must he have been saddening? must we have been saddening? must you have been saddening? must they have been saddening?
Forma interro-negativa
Forma simple
must I not sadden? must you not sadden? must he not sadden? must we not sadden? must you not sadden? must they not sadden?
Forma con V-ing
must I not be saddening? must you not be saddening? must he not be saddening? must we not be saddening? must you not be saddening? must they not be saddening?
Perfecto
must I not have saddened? must you not have saddened? must he not have saddened? must we not have saddened? must you not have saddened? must they not have saddened?
Perfecto con V-ing
must I not have been saddening? must you not have been saddening? must he not have been saddening? must we not have been saddening? must you not have been saddening? must they not have been saddening?