must devoice
Verbo regular: devoice - devoiced- devoiced

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't devoice
you mustn't devoice
he mustn't devoice
we mustn't devoice
you mustn't devoice
they mustn't devoice 	I mustn't be devoicing
you mustn't be devoicing
he mustn't be devoicing
we mustn't be devoicing
you mustn't be devoicing
they mustn't be devoicing	I mustn't have devoiced
you mustn't have devoiced
he mustn't have devoiced
we mustn't have devoiced
you mustn't have devoiced
they mustn't have devoiced	I mustn't have been devoicing
you mustn't have been devoicing
he mustn't have been devoicing
we mustn't have been devoicing
you mustn't have been devoicing
they mustn't have been devoicing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I devoice?
mustn't you devoice?
mustn't he devoice?
mustn't we devoice?
mustn't you devoice?
mustn't they devoice? 	mustn't I be devoicing?
mustn't you be devoicing?
mustn't he be devoicing?
mustn't we be devoicing?
mustn't you be devoicing?
mustn't they be devoicing? 	mustn't I have devoiced?
mustn't you have devoiced?
mustn't he have devoiced?
mustn't we have devoiced?
mustn't you have devoiced?
mustn't they have devoiced? 	mustn't I have been devoicing?
mustn't you have been devoicing?
mustn't he have been devoicing?
mustn't we have been devoicing?
mustn't you have been devoicing?
mustn't they have been devoicing?