must behead
Verbo regular: behead - beheaded- beheaded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must behead
you must behead
he must behead
we must behead
you must behead
they must behead 	I must be beheading
you must be beheading
he must be beheading
we must be beheading
you must be beheading
they must be beheading	I must have beheaded
you must have beheaded
he must have beheaded
we must have beheaded
you must have beheaded
they must have beheaded	I must have been beheading
you must have been beheading
he must have been beheading
we must have been beheading
you must have been beheading
they must have been beheading	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't behead
you mustn't behead
he mustn't behead
we mustn't behead
you mustn't behead
they mustn't behead 	I mustn't be beheading
you mustn't be beheading
he mustn't be beheading
we mustn't be beheading
you mustn't be beheading
they mustn't be beheading	I mustn't have beheaded
you mustn't have beheaded
he mustn't have beheaded
we mustn't have beheaded
you mustn't have beheaded
they mustn't have beheaded	I mustn't have been beheading
you mustn't have been beheading
he mustn't have been beheading
we mustn't have been beheading
you mustn't have been beheading
they mustn't have been beheading	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I behead?
must you behead?
must he behead?
must we behead?
must you behead?
must they behead? 	must I be beheading?
must you be beheading?
must he be beheading?
must we be beheading?
must you be beheading?
must they be beheading? 	must I have beheaded?
must you have beheaded?
must he have beheaded?
must we have beheaded?
must you have beheaded?
must they have beheaded? 	must I have been beheading?
must you have been beheading?
must he have been beheading?
must we have been beheading?
must you have been beheading?
must they have been beheading? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I behead?
mustn't you behead?
mustn't he behead?
mustn't we behead?
mustn't you behead?
mustn't they behead? 	mustn't I be beheading?
mustn't you be beheading?
mustn't he be beheading?
mustn't we be beheading?
mustn't you be beheading?
mustn't they be beheading? 	mustn't I have beheaded?
mustn't you have beheaded?
mustn't he have beheaded?
mustn't we have beheaded?
mustn't you have beheaded?
mustn't they have beheaded? 	mustn't I have been beheading?
mustn't you have been beheading?
mustn't he have been beheading?
mustn't we have been beheading?
mustn't you have been beheading?
mustn't they have been beheading?