can gravel
Regular verb: gravel - gravelled- gravelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can gravel
you can gravel
he can gravel
we can gravel
you can gravel
they can gravel 	I can be gravelling
you can be gravelling
he can be gravelling
we can be gravelling
you can be gravelling
they can be gravelling	I can have gravelled
you can have gravelled
he can have gravelled
we can have gravelled
you can have gravelled
they can have gravelled	I can have been gravelling
you can have been gravelling
he can have been gravelling
we can have been gravelling
you can have been gravelling
they can have been gravelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't gravel
you can't gravel
he can't gravel
we can't gravel
you can't gravel
they can't gravel 	I can't be gravelling
you can't be gravelling
he can't be gravelling
we can't be gravelling
you can't be gravelling
they can't be gravelling	I can't have gravelled
you can't have gravelled
he can't have gravelled
we can't have gravelled
you can't have gravelled
they can't have gravelled	I can't have been gravelling
you can't have been gravelling
he can't have been gravelling
we can't have been gravelling
you can't have been gravelling
they can't have been gravelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I gravel?
can you gravel?
can he gravel?
can we gravel?
can you gravel?
can they gravel? 	can I be gravelling?
can you be gravelling?
can he be gravelling?
can we be gravelling?
can you be gravelling?
can they be gravelling? 	can I have gravelled?
can you have gravelled?
can he have gravelled?
can we have gravelled?
can you have gravelled?
can they have gravelled? 	can I have been gravelling?
can you have been gravelling?
can he have been gravelling?
can we have been gravelling?
can you have been gravelling?
can they have been gravelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I gravel?
can't you gravel?
can't he gravel?
can't we gravel?
can't you gravel?
can't they gravel? 	can't I be gravelling?
can't you be gravelling?
can't he be gravelling?
can't we be gravelling?
can't you be gravelling?
can't they be gravelling? 	can't I have gravelled?
can't you have gravelled?
can't he have gravelled?
can't we have gravelled?
can't you have gravelled?
can't they have gravelled? 	can't I have been gravelling?
can't you have been gravelling?
can't he have been gravelling?
can't we have been gravelling?
can't you have been gravelling?
can't they have been gravelling?