English verb conjugation
COULD DEVOICE

Regular verb: devoice - devoiced - devoiced

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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