may refuel
Regular verb: refuel - refuelled- refuelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may refuel
you may refuel
she may refuel
we may refuel
you may refuel
they may refuel 	I may be refuelling
you may be refuelling
she may be refuelling
we may be refuelling
you may be refuelling
they may be refuelling	I may have refuelled
you may have refuelled
she 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
she 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 mayn't refuel
you mayn't refuel
she mayn't refuel
we mayn't refuel
you mayn't refuel
they mayn't refuel 	I mayn't be refuelling
you mayn't be refuelling
she mayn't be refuelling
we mayn't be refuelling
you mayn't be refuelling
they mayn't be refuelling	I mayn't have refuelled
you mayn't have refuelled
she mayn't have refuelled
we mayn't have refuelled
you mayn't have refuelled
they mayn't have refuelled	I mayn't have been refuelling
you mayn't have been refuelling
she mayn't have been refuelling
we mayn't have been refuelling
you mayn't have been refuelling
they mayn't have been refuelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I refuel?
may you refuel?
may she refuel?
may we refuel?
may you refuel?
may they refuel? 	may I be refuelling?
may you be refuelling?
may she be refuelling?
may we be refuelling?
may you be refuelling?
may they be refuelling? 	may I have refuelled?
may you have refuelled?
may she 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 she 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 	
mayn't I refuel?
mayn't you refuel?
mayn't she refuel?
mayn't we refuel?
mayn't you refuel?
mayn't they refuel? 	mayn't I be refuelling?
mayn't you be refuelling?
mayn't she be refuelling?
mayn't we be refuelling?
mayn't you be refuelling?
mayn't they be refuelling? 	mayn't I have refuelled?
mayn't you have refuelled?
mayn't she have refuelled?
mayn't we have refuelled?
mayn't you have refuelled?
mayn't they have refuelled? 	mayn't I have been refuelling?
mayn't you have been refuelling?
mayn't she have been refuelling?
mayn't we have been refuelling?
mayn't you have been refuelling?
mayn't they have been refuelling?