may cancel
Regular verb: cancel - cancelled- cancelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may cancel
you may cancel
he may cancel
we may cancel
you may cancel
they may cancel 	I may be cancelling
you may be cancelling
he may be cancelling
we may be cancelling
you may be cancelling
they may be cancelling	I may have cancelled
you may have cancelled
he may have cancelled
we may have cancelled
you may have cancelled
they may have cancelled	I may have been cancelling
you may have been cancelling
he may have been cancelling
we may have been cancelling
you may have been cancelling
they may have been cancelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't cancel
you mayn't cancel
he mayn't cancel
we mayn't cancel
you mayn't cancel
they mayn't cancel 	I mayn't be cancelling
you mayn't be cancelling
he mayn't be cancelling
we mayn't be cancelling
you mayn't be cancelling
they mayn't be cancelling	I mayn't have cancelled
you mayn't have cancelled
he mayn't have cancelled
we mayn't have cancelled
you mayn't have cancelled
they mayn't have cancelled	I mayn't have been cancelling
you mayn't have been cancelling
he mayn't have been cancelling
we mayn't have been cancelling
you mayn't have been cancelling
they mayn't have been cancelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I cancel?
may you cancel?
may he cancel?
may we cancel?
may you cancel?
may they cancel? 	may I be cancelling?
may you be cancelling?
may he be cancelling?
may we be cancelling?
may you be cancelling?
may they be cancelling? 	may I have cancelled?
may you have cancelled?
may he have cancelled?
may we have cancelled?
may you have cancelled?
may they have cancelled? 	may I have been cancelling?
may you have been cancelling?
may he have been cancelling?
may we have been cancelling?
may you have been cancelling?
may they have been cancelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I cancel?
mayn't you cancel?
mayn't he cancel?
mayn't we cancel?
mayn't you cancel?
mayn't they cancel? 	mayn't I be cancelling?
mayn't you be cancelling?
mayn't he be cancelling?
mayn't we be cancelling?
mayn't you be cancelling?
mayn't they be cancelling? 	mayn't I have cancelled?
mayn't you have cancelled?
mayn't he have cancelled?
mayn't we have cancelled?
mayn't you have cancelled?
mayn't they have cancelled? 	mayn't I have been cancelling?
mayn't you have been cancelling?
mayn't he have been cancelling?
mayn't we have been cancelling?
mayn't you have been cancelling?
mayn't they have been cancelling?