I must brush you must brush she must brush we must brush you must brush they must brush
Forma con V-ing
I must be brushing you must be brushing she must be brushing we must be brushing you must be brushing they must be brushing
Perfecto
I must have brushed you must have brushed she 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 she 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 she 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 she 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 she 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 she 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 she brush? must we brush? must you brush? must they brush?
Forma con V-ing
must I be brushing? must you be brushing? must she be brushing? must we be brushing? must you be brushing? must they be brushing?
Perfecto
must I have brushed? must you have brushed? must she 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 she 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 she 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 she 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 she 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 she not have been brushing? must we not have been brushing? must you not have been brushing? must they not have been brushing?