I must believe you must believe he must believe we must believe you must believe they must believe
Forma com V-ing
I must be believing you must be believing he must be believing we must be believing you must be believing they must be believing
Perfeito
I must have believed you must have believed he must have believed we must have believed you must have believed they must have believed
Perfeito com V-ing
I must have been believing you must have been believing he must have been believing we must have been believing you must have been believing they must have been believing
Negação
Forma simple
I mustn't believe you mustn't believe he mustn't believe we mustn't believe you mustn't believe they mustn't believe
Forma com V-ing
I mustn't be believing you mustn't be believing he mustn't be believing we mustn't be believing you mustn't be believing they mustn't be believing
Perfeito
I mustn't have believed you mustn't have believed he mustn't have believed we mustn't have believed you mustn't have believed they mustn't have believed
Perfeito com V-ing
I mustn't have been believing you mustn't have been believing he mustn't have been believing we mustn't have been believing you mustn't have been believing they mustn't have been believing
Forma interrogativa
Forma simple
must I believe? must you believe? must he believe? must we believe? must you believe? must they believe?
Forma com V-ing
must I be believing? must you be believing? must he be believing? must we be believing? must you be believing? must they be believing?
Perfeito
must I have believed? must you have believed? must he have believed? must we have believed? must you have believed? must they have believed?
Perfeito com V-ing
must I have been believing? must you have been believing? must he have been believing? must we have been believing? must you have been believing? must they have been believing?
Forma interro-Negação
Forma simple
mustn't I believe? mustn't you believe? mustn't he believe? mustn't we believe? mustn't you believe? mustn't they believe?
Forma com V-ing
mustn't I be believing? mustn't you be believing? mustn't he be believing? mustn't we be believing? mustn't you be believing? mustn't they be believing?
Perfeito
mustn't I have believed? mustn't you have believed? mustn't he have believed? mustn't we have believed? mustn't you have believed? mustn't they have believed?
Perfeito com V-ing
mustn't I have been believing? mustn't you have been believing? mustn't he have been believing? mustn't we have been believing? mustn't you have been believing? mustn't they have been believing?