can ahead
Regular verb: ahead - aheaded- aheaded

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

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

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

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