English verb conjugation
MUST ACKNOWLEDGE

Regular verb: acknowledge - acknowledged - acknowledged

Affirmation

Simple form	V-ing form
I must acknowledge you must acknowledge he must acknowledge we must acknowledge you must acknowledge they must acknowledge	I must be acknowledging you must be acknowledging he must be acknowledging we must be acknowledging you must be acknowledging they must be acknowledging
Perfect	V-ing perfect
I must have acknowledged you must have acknowledged he must have acknowledged we must have acknowledged you must have acknowledged they must have acknowledged	I must have been acknowledging you must have been acknowledging he must have been acknowledging we must have been acknowledging you must have been acknowledging they must have been acknowledging

Negation

Simple form	V-ing form
I must not acknowledge you must not acknowledge he must not acknowledge we must not acknowledge you must not acknowledge they must not acknowledge	I must not be acknowledging you must not be acknowledging he must not be acknowledging we must not be acknowledging you must not be acknowledging they must not be acknowledging
Perfect	V-ing perfect
I must not have acknowledged you must not have acknowledged he must not have acknowledged we must not have acknowledged you must not have acknowledged they must not have acknowledged	I must not have been acknowledging you must not have been acknowledging he must not have been acknowledging we must not have been acknowledging you must not have been acknowledging they must not have been acknowledging

Interrogative form

Simple form	V-ing form
must I acknowledge? must you acknowledge? must he acknowledge? must we acknowledge? must you acknowledge? must they acknowledge?	must I be acknowledging? must you be acknowledging? must he be acknowledging? must we be acknowledging? must you be acknowledging? must they be acknowledging?
Perfect	V-ing perfect
must I have acknowledged? must you have acknowledged? must he have acknowledged? must we have acknowledged? must you have acknowledged? must they have acknowledged?	must I have been acknowledging? must you have been acknowledging? must he have been acknowledging? must we have been acknowledging? must you have been acknowledging? must they have been acknowledging?

Interro-negative form

Simple form	V-ing form
must I not acknowledge? must you not acknowledge? must he not acknowledge? must we not acknowledge? must you not acknowledge? must they not acknowledge?	must I not be acknowledging? must you not be acknowledging? must he not be acknowledging? must we not be acknowledging? must you not be acknowledging? must they not be acknowledging?
Perfect	V-ing perfect
must I not have acknowledged? must you not have acknowledged? must he not have acknowledged? must we not have acknowledged? must you not have acknowledged? must they not have acknowledged?	must I not have been acknowledging? must you not have been acknowledging? must he not have been acknowledging? must we not have been acknowledging? must you not have been acknowledging? must they not have been acknowledging?