I must saber you must saber he must saber we must saber you must saber they must saber
Forma con V-ing
I must be sabering you must be sabering he must be sabering we must be sabering you must be sabering they must be sabering
Perfecto
I must have sabered you must have sabered he must have sabered we must have sabered you must have sabered they must have sabered
Perfecto con V-ing
I must have been sabering you must have been sabering he must have been sabering we must have been sabering you must have been sabering they must have been sabering
Negación
Forma simple
I must not saber you must not saber he must not saber we must not saber you must not saber they must not saber
Forma con V-ing
I must not be sabering you must not be sabering he must not be sabering we must not be sabering you must not be sabering they must not be sabering
Perfecto
I must not have sabered you must not have sabered he must not have sabered we must not have sabered you must not have sabered they must not have sabered
Perfecto con V-ing
I must not have been sabering you must not have been sabering he must not have been sabering we must not have been sabering you must not have been sabering they must not have been sabering
Forma interrogativa
Forma simple
must I saber? must you saber? must he saber? must we saber? must you saber? must they saber?
Forma con V-ing
must I be sabering? must you be sabering? must he be sabering? must we be sabering? must you be sabering? must they be sabering?
Perfecto
must I have sabered? must you have sabered? must he have sabered? must we have sabered? must you have sabered? must they have sabered?
Perfecto con V-ing
must I have been sabering? must you have been sabering? must he have been sabering? must we have been sabering? must you have been sabering? must they have been sabering?
Forma interro-negativa
Forma simple
must I not saber? must you not saber? must he not saber? must we not saber? must you not saber? must they not saber?
Forma con V-ing
must I not be sabering? must you not be sabering? must he not be sabering? must we not be sabering? must you not be sabering? must they not be sabering?
Perfecto
must I not have sabered? must you not have sabered? must he not have sabered? must we not have sabered? must you not have sabered? must they not have sabered?
Perfecto con V-ing
must I not have been sabering? must you not have been sabering? must he not have been sabering? must we not have been sabering? must you not have been sabering? must they not have been sabering?