may behead
Regular verb: behead - beheaded- beheaded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may behead
you may behead
she may behead
we may behead
you may behead
they may behead 	I may be beheading
you may be beheading
she may be beheading
we may be beheading
you may be beheading
they may be beheading	I may have beheaded
you may have beheaded
she may have beheaded
we may have beheaded
you may have beheaded
they may have beheaded	I may have been beheading
you may have been beheading
she may have been beheading
we may have been beheading
you may have been beheading
they may have been beheading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't behead
you mayn't behead
she mayn't behead
we mayn't behead
you mayn't behead
they mayn't behead 	I mayn't be beheading
you mayn't be beheading
she mayn't be beheading
we mayn't be beheading
you mayn't be beheading
they mayn't be beheading	I mayn't have beheaded
you mayn't have beheaded
she mayn't have beheaded
we mayn't have beheaded
you mayn't have beheaded
they mayn't have beheaded	I mayn't have been beheading
you mayn't have been beheading
she mayn't have been beheading
we mayn't have been beheading
you mayn't have been beheading
they mayn't have been beheading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I behead?
may you behead?
may she behead?
may we behead?
may you behead?
may they behead? 	may I be beheading?
may you be beheading?
may she be beheading?
may we be beheading?
may you be beheading?
may they be beheading? 	may I have beheaded?
may you have beheaded?
may she have beheaded?
may we have beheaded?
may you have beheaded?
may they have beheaded? 	may I have been beheading?
may you have been beheading?
may she have been beheading?
may we have been beheading?
may you have been beheading?
may they have been beheading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I behead?
mayn't you behead?
mayn't she behead?
mayn't we behead?
mayn't you behead?
mayn't they behead? 	mayn't I be beheading?
mayn't you be beheading?
mayn't she be beheading?
mayn't we be beheading?
mayn't you be beheading?
mayn't they be beheading? 	mayn't I have beheaded?
mayn't you have beheaded?
mayn't she have beheaded?
mayn't we have beheaded?
mayn't you have beheaded?
mayn't they have beheaded? 	mayn't I have been beheading?
mayn't you have been beheading?
mayn't she have been beheading?
mayn't we have been beheading?
mayn't you have been beheading?
mayn't they have been beheading?