English verb conjugation
MUST BELIEVE

Regular verb: believe - believed - believed

Affirmation

Simple form	V-ing form
I must believe you must believe he must believe we must believe you must believe they must believe	I must be believing you must be believing he must be believing we must be believing you must be believing they must be believing
Perfect	V-ing perfect
I must have believed you must have believed he must have believed we must have believed you must have believed they must have believed	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

Negation

Simple form	V-ing form
I must not believe you must not believe he must not believe we must not believe you must not believe they must not believe	I must not be believing you must not be believing he must not be believing we must not be believing you must not be believing they must not be believing
Perfect	V-ing perfect
I must not have believed you must not have believed he must not have believed we must not have believed you must not have believed they must not have believed	I must not have been believing you must not have been believing he must not have been believing we must not have been believing you must not have been believing they must not have been believing

Interrogative form

Simple form	V-ing form
must I believe? must you believe? must he believe? must we believe? must you believe? must they believe?	must I be believing? must you be believing? must he be believing? must we be believing? must you be believing? must they be believing?
Perfect	V-ing perfect
must I have believed? must you have believed? must he have believed? must we have believed? must you have believed? must they have believed?	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?

Interro-negative form

Simple form	V-ing form
must I not believe? must you not believe? must he not believe? must we not believe? must you not believe? must they not believe?	must I not be believing? must you not be believing? must he not be believing? must we not be believing? must you not be believing? must they not be believing?
Perfect	V-ing perfect
must I not have believed? must you not have believed? must he not have believed? must we not have believed? must you not have believed? must they not have believed?	must I not have been believing? must you not have been believing? must he not have been believing? must we not have been believing? must you not have been believing? must they not have been believing?