I must unmask you must unmask he must unmask we must unmask you must unmask they must unmask
Forma con V-ing
I must be unmasking you must be unmasking he must be unmasking we must be unmasking you must be unmasking they must be unmasking
Perfecto
I must have unmasked you must have unmasked he must have unmasked we must have unmasked you must have unmasked they must have unmasked
Perfecto con V-ing
I must have been unmasking you must have been unmasking he must have been unmasking we must have been unmasking you must have been unmasking they must have been unmasking
Negación
Forma simple
I must not unmask you must not unmask he must not unmask we must not unmask you must not unmask they must not unmask
Forma con V-ing
I must not be unmasking you must not be unmasking he must not be unmasking we must not be unmasking you must not be unmasking they must not be unmasking
Perfecto
I must not have unmasked you must not have unmasked he must not have unmasked we must not have unmasked you must not have unmasked they must not have unmasked
Perfecto con V-ing
I must not have been unmasking you must not have been unmasking he must not have been unmasking we must not have been unmasking you must not have been unmasking they must not have been unmasking
Forma interrogativa
Forma simple
must I unmask? must you unmask? must he unmask? must we unmask? must you unmask? must they unmask?
Forma con V-ing
must I be unmasking? must you be unmasking? must he be unmasking? must we be unmasking? must you be unmasking? must they be unmasking?
Perfecto
must I have unmasked? must you have unmasked? must he have unmasked? must we have unmasked? must you have unmasked? must they have unmasked?
Perfecto con V-ing
must I have been unmasking? must you have been unmasking? must he have been unmasking? must we have been unmasking? must you have been unmasking? must they have been unmasking?
Forma interro-negativa
Forma simple
must I not unmask? must you not unmask? must he not unmask? must we not unmask? must you not unmask? must they not unmask?
Forma con V-ing
must I not be unmasking? must you not be unmasking? must he not be unmasking? must we not be unmasking? must you not be unmasking? must they not be unmasking?
Perfecto
must I not have unmasked? must you not have unmasked? must he not have unmasked? must we not have unmasked? must you not have unmasked? must they not have unmasked?
Perfecto con V-ing
must I not have been unmasking? must you not have been unmasking? must he not have been unmasking? must we not have been unmasking? must you not have been unmasking? must they not have been unmasking?