English verb conjugation
MUST DEVOICE

Regular verb: devoice - devoiced - devoiced

Affirmation

Simple form	V-ing form
I must devoice you must devoice he must devoice we must devoice you must devoice they must devoice	I must be devoicing you must be devoicing he 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 he 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 he 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 he 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 he 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 he 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 he 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 he devoice? must we devoice? must you devoice? must they devoice?	must I be devoicing? must you be devoicing? must he 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 he 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 he 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 he 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 he 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 he 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 he not have been devoicing? must we not have been devoicing? must you not have been devoicing? must they not have been devoicing?