must ahead
Regular verb: ahead - aheaded- aheaded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must ahead
you must ahead
he must ahead
we must ahead
you must ahead
they must ahead 	I must be aheading
you must be aheading
he must be aheading
we must be aheading
you must be aheading
they must be aheading	I must have aheaded
you must have aheaded
he must have aheaded
we must have aheaded
you must have aheaded
they must have aheaded	I must have been aheading
you must have been aheading
he must have been aheading
we must have been aheading
you must have been aheading
they must have been aheading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't ahead
you mustn't ahead
he mustn't ahead
we mustn't ahead
you mustn't ahead
they mustn't ahead 	I mustn't be aheading
you mustn't be aheading
he mustn't be aheading
we mustn't be aheading
you mustn't be aheading
they mustn't be aheading	I mustn't have aheaded
you mustn't have aheaded
he mustn't have aheaded
we mustn't have aheaded
you mustn't have aheaded
they mustn't have aheaded	I mustn't have been aheading
you mustn't have been aheading
he mustn't have been aheading
we mustn't have been aheading
you mustn't have been aheading
they mustn't have been aheading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I ahead?
must you ahead?
must he ahead?
must we ahead?
must you ahead?
must they ahead? 	must I be aheading?
must you be aheading?
must he be aheading?
must we be aheading?
must you be aheading?
must they be aheading? 	must I have aheaded?
must you have aheaded?
must he have aheaded?
must we have aheaded?
must you have aheaded?
must they have aheaded? 	must I have been aheading?
must you have been aheading?
must he have been aheading?
must we have been aheading?
must you have been aheading?
must they have been aheading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I ahead?
mustn't you ahead?
mustn't he ahead?
mustn't we ahead?
mustn't you ahead?
mustn't they ahead? 	mustn't I be aheading?
mustn't you be aheading?
mustn't he be aheading?
mustn't we be aheading?
mustn't you be aheading?
mustn't they be aheading? 	mustn't I have aheaded?
mustn't you have aheaded?
mustn't he have aheaded?
mustn't we have aheaded?
mustn't you have aheaded?
mustn't they have aheaded? 	mustn't I have been aheading?
mustn't you have been aheading?
mustn't he have been aheading?
mustn't we have been aheading?
mustn't you have been aheading?
mustn't they have been aheading?