can gridiron
Regular verb: gridiron - gridironed- gridironed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can gridiron
you can gridiron
he can gridiron
we can gridiron
you can gridiron
they can gridiron 	I can be gridironing
you can be gridironing
he can be gridironing
we can be gridironing
you can be gridironing
they can be gridironing	I can have gridironed
you can have gridironed
he can have gridironed
we can have gridironed
you can have gridironed
they can have gridironed	I can have been gridironing
you can have been gridironing
he can have been gridironing
we can have been gridironing
you can have been gridironing
they can have been gridironing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't gridiron
you can't gridiron
he can't gridiron
we can't gridiron
you can't gridiron
they can't gridiron 	I can't be gridironing
you can't be gridironing
he can't be gridironing
we can't be gridironing
you can't be gridironing
they can't be gridironing	I can't have gridironed
you can't have gridironed
he can't have gridironed
we can't have gridironed
you can't have gridironed
they can't have gridironed	I can't have been gridironing
you can't have been gridironing
he can't have been gridironing
we can't have been gridironing
you can't have been gridironing
they can't have been gridironing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I gridiron?
can you gridiron?
can he gridiron?
can we gridiron?
can you gridiron?
can they gridiron? 	can I be gridironing?
can you be gridironing?
can he be gridironing?
can we be gridironing?
can you be gridironing?
can they be gridironing? 	can I have gridironed?
can you have gridironed?
can he have gridironed?
can we have gridironed?
can you have gridironed?
can they have gridironed? 	can I have been gridironing?
can you have been gridironing?
can he have been gridironing?
can we have been gridironing?
can you have been gridironing?
can they have been gridironing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I gridiron?
can't you gridiron?
can't he gridiron?
can't we gridiron?
can't you gridiron?
can't they gridiron? 	can't I be gridironing?
can't you be gridironing?
can't he be gridironing?
can't we be gridironing?
can't you be gridironing?
can't they be gridironing? 	can't I have gridironed?
can't you have gridironed?
can't he have gridironed?
can't we have gridironed?
can't you have gridironed?
can't they have gridironed? 	can't I have been gridironing?
can't you have been gridironing?
can't he have been gridironing?
can't we have been gridironing?
can't you have been gridironing?
can't they have been gridironing?