English verb conjugation
MUST DEVOICE

Regular verb: devoice - devoiced - devoiced

Affirmation

Simple form	V-ing form
I must devoice you must devoice she must devoice we must devoice you must devoice they must devoice	I must be devoicing you must be devoicing she must be devoicing we must be devoicing you must be devoicing they must be devoicing
Perfect	V-ing perfect
I must have devoiced you must have devoiced she must have devoiced we must have devoiced you must have devoiced they must have devoiced	I must have been devoicing you must have been devoicing she must have been devoicing we must have been devoicing you must have been devoicing they must have been devoicing

Negation

Simple form	V-ing form
I must not devoice you must not devoice she must not devoice we must not devoice you must not devoice they must not devoice	I must not be devoicing you must not be devoicing she must not be devoicing we must not be devoicing you must not be devoicing they must not be devoicing
Perfect	V-ing perfect
I must not have devoiced you must not have devoiced she must not have devoiced we must not have devoiced you must not have devoiced they must not have devoiced	I must not have been devoicing you must not have been devoicing she must not have been devoicing we must not have been devoicing you must not have been devoicing they must not have been devoicing

Interrogative form

Simple form	V-ing form
must I devoice? must you devoice? must she devoice? must we devoice? must you devoice? must they devoice?	must I be devoicing? must you be devoicing? must she be devoicing? must we be devoicing? must you be devoicing? must they be devoicing?
Perfect	V-ing perfect
must I have devoiced? must you have devoiced? must she have devoiced? must we have devoiced? must you have devoiced? must they have devoiced?	must I have been devoicing? must you have been devoicing? must she have been devoicing? must we have been devoicing? must you have been devoicing? must they have been devoicing?

Interro-negative form

Simple form	V-ing form
must I not devoice? must you not devoice? must she not devoice? must we not devoice? must you not devoice? must they not devoice?	must I not be devoicing? must you not be devoicing? must she not be devoicing? must we not be devoicing? must you not be devoicing? must they not be devoicing?
Perfect	V-ing perfect
must I not have devoiced? must you not have devoiced? must she not have devoiced? must we not have devoiced? must you not have devoiced? must they not have devoiced?	must I not have been devoicing? must you not have been devoicing? must she not have been devoicing? must we not have been devoicing? must you not have been devoicing? must they not have been devoicing?