may refuel
Regular verb: refuel - refuelled- refuelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may refuel
you may refuel
he may refuel
we may refuel
you may refuel
they may refuel 	I may be refuelling
you may be refuelling
he may be refuelling
we may be refuelling
you may be refuelling
they may be refuelling	I may have refuelled
you may have refuelled
he may have refuelled
we may have refuelled
you may have refuelled
they may have refuelled	I may have been refuelling
you may have been refuelling
he may have been refuelling
we may have been refuelling
you may have been refuelling
they may have been refuelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not refuel
you may not refuel
he may not refuel
we may not refuel
you may not refuel
they may not refuel 	I may not be refuelling
you may not be refuelling
he may not be refuelling
we may not be refuelling
you may not be refuelling
they may not be refuelling	I may not have refuelled
you may not have refuelled
he may not have refuelled
we may not have refuelled
you may not have refuelled
they may not have refuelled	I may not have been refuelling
you may not have been refuelling
he may not have been refuelling
we may not have been refuelling
you may not have been refuelling
they may not have been refuelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I refuel?
may you refuel?
may he refuel?
may we refuel?
may you refuel?
may they refuel? 	may I be refuelling?
may you be refuelling?
may he be refuelling?
may we be refuelling?
may you be refuelling?
may they be refuelling? 	may I have refuelled?
may you have refuelled?
may he have refuelled?
may we have refuelled?
may you have refuelled?
may they have refuelled? 	may I have been refuelling?
may you have been refuelling?
may he have been refuelling?
may we have been refuelling?
may you have been refuelling?
may they have been refuelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not refuel?
may you not refuel?
may he not refuel?
may we not refuel?
may you not refuel?
may they not refuel? 	may I not be refuelling?
may you not be refuelling?
may he not be refuelling?
may we not be refuelling?
may you not be refuelling?
may they not be refuelling? 	may I not have refuelled?
may you not have refuelled?
may he not have refuelled?
may we not have refuelled?
may you not have refuelled?
may they not have refuelled? 	may I not have been refuelling?
may you not have been refuelling?
may he not have been refuelling?
may we not have been refuelling?
may you not have been refuelling?
may they not have been refuelling?