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
she must behead
we must behead
you must behead
they must behead 	I must be beheading
you must be beheading
she must be beheading
we must be beheading
you must be beheading
they must be beheading	I must have beheaded
you must have beheaded
she 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
she 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
she 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
she 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
she 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
she 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 she behead?
must we behead?
must you behead?
must they behead? 	must I be beheading?
must you be beheading?
must she be beheading?
must we be beheading?
must you be beheading?
must they be beheading? 	must I have beheaded?
must you have beheaded?
must she 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 she 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 she 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 she 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 she 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 she have been beheading?
mustn't we have been beheading?
mustn't you have been beheading?
mustn't they have been beheading?