I must swear you must swear he must swear we must swear you must swear they must swear
Forma con V-ing
I must be swearing you must be swearing he must be swearing we must be swearing you must be swearing they must be swearing
Perfecto
I must have sworn you must have sworn he must have sworn we must have sworn you must have sworn they must have sworn
Perfecto con V-ing
I must have been swearing you must have been swearing he must have been swearing we must have been swearing you must have been swearing they must have been swearing
Negación
Forma simple
I must not swear you must not swear he must not swear we must not swear you must not swear they must not swear
Forma con V-ing
I must not be swearing you must not be swearing he must not be swearing we must not be swearing you must not be swearing they must not be swearing
Perfecto
I must not have sworn you must not have sworn he must not have sworn we must not have sworn you must not have sworn they must not have sworn
Perfecto con V-ing
I must not have been swearing you must not have been swearing he must not have been swearing we must not have been swearing you must not have been swearing they must not have been swearing
Forma interrogativa
Forma simple
must I swear? must you swear? must he swear? must we swear? must you swear? must they swear?
Forma con V-ing
must I be swearing? must you be swearing? must he be swearing? must we be swearing? must you be swearing? must they be swearing?
Perfecto
must I have sworn? must you have sworn? must he have sworn? must we have sworn? must you have sworn? must they have sworn?
Perfecto con V-ing
must I have been swearing? must you have been swearing? must he have been swearing? must we have been swearing? must you have been swearing? must they have been swearing?
Forma interro-negativa
Forma simple
must I not swear? must you not swear? must he not swear? must we not swear? must you not swear? must they not swear?
Forma con V-ing
must I not be swearing? must you not be swearing? must he not be swearing? must we not be swearing? must you not be swearing? must they not be swearing?
Perfecto
must I not have sworn? must you not have sworn? must he not have sworn? must we not have sworn? must you not have sworn? must they not have sworn?
Perfecto con V-ing
must I not have been swearing? must you not have been swearing? must he not have been swearing? must we not have been swearing? must you not have been swearing? must they not have been swearing?