I must brush you must brush he must brush we must brush you must brush they must brush
Forma con V-ing
I must be brushing you must be brushing he must be brushing we must be brushing you must be brushing they must be brushing
Perfecto
I must have brushed you must have brushed he must have brushed we must have brushed you must have brushed they must have brushed
Perfecto con V-ing
I must have been brushing you must have been brushing he must have been brushing we must have been brushing you must have been brushing they must have been brushing
Negación
Forma simple
I must not brush you must not brush he must not brush we must not brush you must not brush they must not brush
Forma con V-ing
I must not be brushing you must not be brushing he must not be brushing we must not be brushing you must not be brushing they must not be brushing
Perfecto
I must not have brushed you must not have brushed he must not have brushed we must not have brushed you must not have brushed they must not have brushed
Perfecto con V-ing
I must not have been brushing you must not have been brushing he must not have been brushing we must not have been brushing you must not have been brushing they must not have been brushing
Forma interrogativa
Forma simple
must I brush? must you brush? must he brush? must we brush? must you brush? must they brush?
Forma con V-ing
must I be brushing? must you be brushing? must he be brushing? must we be brushing? must you be brushing? must they be brushing?
Perfecto
must I have brushed? must you have brushed? must he have brushed? must we have brushed? must you have brushed? must they have brushed?
Perfecto con V-ing
must I have been brushing? must you have been brushing? must he have been brushing? must we have been brushing? must you have been brushing? must they have been brushing?
Forma interro-negativa
Forma simple
must I not brush? must you not brush? must he not brush? must we not brush? must you not brush? must they not brush?
Forma con V-ing
must I not be brushing? must you not be brushing? must he not be brushing? must we not be brushing? must you not be brushing? must they not be brushing?
Perfecto
must I not have brushed? must you not have brushed? must he not have brushed? must we not have brushed? must you not have brushed? must they not have brushed?
Perfecto con V-ing
must I not have been brushing? must you not have been brushing? must he not have been brushing? must we not have been brushing? must you not have been brushing? must they not have been brushing?