I must bum you must bum she must bum we must bum you must bum they must bum
Forma con V-ing
I must be bumming you must be bumming she must be bumming we must be bumming you must be bumming they must be bumming
Perfecto
I must have bummed you must have bummed she must have bummed we must have bummed you must have bummed they must have bummed
Perfecto con V-ing
I must have been bumming you must have been bumming she must have been bumming we must have been bumming you must have been bumming they must have been bumming
Negación
Forma simple
I must not bum you must not bum she must not bum we must not bum you must not bum they must not bum
Forma con V-ing
I must not be bumming you must not be bumming she must not be bumming we must not be bumming you must not be bumming they must not be bumming
Perfecto
I must not have bummed you must not have bummed she must not have bummed we must not have bummed you must not have bummed they must not have bummed
Perfecto con V-ing
I must not have been bumming you must not have been bumming she must not have been bumming we must not have been bumming you must not have been bumming they must not have been bumming
Forma interrogativa
Forma simple
must I bum? must you bum? must she bum? must we bum? must you bum? must they bum?
Forma con V-ing
must I be bumming? must you be bumming? must she be bumming? must we be bumming? must you be bumming? must they be bumming?
Perfecto
must I have bummed? must you have bummed? must she have bummed? must we have bummed? must you have bummed? must they have bummed?
Perfecto con V-ing
must I have been bumming? must you have been bumming? must she have been bumming? must we have been bumming? must you have been bumming? must they have been bumming?
Forma interro-negativa
Forma simple
must I not bum? must you not bum? must she not bum? must we not bum? must you not bum? must they not bum?
Forma con V-ing
must I not be bumming? must you not be bumming? must she not be bumming? must we not be bumming? must you not be bumming? must they not be bumming?
Perfecto
must I not have bummed? must you not have bummed? must she not have bummed? must we not have bummed? must you not have bummed? must they not have bummed?
Perfecto con V-ing
must I not have been bumming? must you not have been bumming? must she not have been bumming? must we not have been bumming? must you not have been bumming? must they not have been bumming?