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 mustn't brush you mustn't brush he mustn't brush we mustn't brush you mustn't brush they mustn't brush
Forma con V-ing
I mustn't be brushing you mustn't be brushing he mustn't be brushing we mustn't be brushing you mustn't be brushing they mustn't be brushing
Perfecto
I mustn't have brushed you mustn't have brushed he mustn't have brushed we mustn't have brushed you mustn't have brushed they mustn't have brushed
Perfecto con V-ing
I mustn't have been brushing you mustn't have been brushing he mustn't have been brushing we mustn't have been brushing you mustn't have been brushing they mustn't 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
mustn't I brush? mustn't you brush? mustn't he brush? mustn't we brush? mustn't you brush? mustn't they brush?
Forma con V-ing
mustn't I be brushing? mustn't you be brushing? mustn't he be brushing? mustn't we be brushing? mustn't you be brushing? mustn't they be brushing?
Perfecto
mustn't I have brushed? mustn't you have brushed? mustn't he have brushed? mustn't we have brushed? mustn't you have brushed? mustn't they have brushed?
Perfecto con V-ing
mustn't I have been brushing? mustn't you have been brushing? mustn't he have been brushing? mustn't we have been brushing? mustn't you have been brushing? mustn't they have been brushing?