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 mustn't swear you mustn't swear he mustn't swear we mustn't swear you mustn't swear they mustn't swear
Forma con V-ing
I mustn't be swearing you mustn't be swearing he mustn't be swearing we mustn't be swearing you mustn't be swearing they mustn't be swearing
Perfecto
I mustn't have sworn you mustn't have sworn he mustn't have sworn we mustn't have sworn you mustn't have sworn they mustn't have sworn
Perfecto con V-ing
I mustn't have been swearing you mustn't have been swearing he mustn't have been swearing we mustn't have been swearing you mustn't have been swearing they mustn't 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
mustn't I swear? mustn't you swear? mustn't he swear? mustn't we swear? mustn't you swear? mustn't they swear?
Forma con V-ing
mustn't I be swearing? mustn't you be swearing? mustn't he be swearing? mustn't we be swearing? mustn't you be swearing? mustn't they be swearing?
Perfecto
mustn't I have sworn? mustn't you have sworn? mustn't he have sworn? mustn't we have sworn? mustn't you have sworn? mustn't they have sworn?
Perfecto con V-ing
mustn't I have been swearing? mustn't you have been swearing? mustn't he have been swearing? mustn't we have been swearing? mustn't you have been swearing? mustn't they have been swearing?