may dun
Regular verb: dun - dunned- dunned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may dun
you may dun
he may dun
we may dun
you may dun
they may dun 	I may be dunning
you may be dunning
he may be dunning
we may be dunning
you may be dunning
they may be dunning	I may have dunned
you may have dunned
he may have dunned
we may have dunned
you may have dunned
they may have dunned	I may have been dunning
you may have been dunning
he may have been dunning
we may have been dunning
you may have been dunning
they may have been dunning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't dun
you mayn't dun
he mayn't dun
we mayn't dun
you mayn't dun
they mayn't dun 	I mayn't be dunning
you mayn't be dunning
he mayn't be dunning
we mayn't be dunning
you mayn't be dunning
they mayn't be dunning	I mayn't have dunned
you mayn't have dunned
he mayn't have dunned
we mayn't have dunned
you mayn't have dunned
they mayn't have dunned	I mayn't have been dunning
you mayn't have been dunning
he mayn't have been dunning
we mayn't have been dunning
you mayn't have been dunning
they mayn't have been dunning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I dun?
may you dun?
may he dun?
may we dun?
may you dun?
may they dun? 	may I be dunning?
may you be dunning?
may he be dunning?
may we be dunning?
may you be dunning?
may they be dunning? 	may I have dunned?
may you have dunned?
may he have dunned?
may we have dunned?
may you have dunned?
may they have dunned? 	may I have been dunning?
may you have been dunning?
may he have been dunning?
may we have been dunning?
may you have been dunning?
may they have been dunning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I dun?
mayn't you dun?
mayn't he dun?
mayn't we dun?
mayn't you dun?
mayn't they dun? 	mayn't I be dunning?
mayn't you be dunning?
mayn't he be dunning?
mayn't we be dunning?
mayn't you be dunning?
mayn't they be dunning? 	mayn't I have dunned?
mayn't you have dunned?
mayn't he have dunned?
mayn't we have dunned?
mayn't you have dunned?
mayn't they have dunned? 	mayn't I have been dunning?
mayn't you have been dunning?
mayn't he have been dunning?
mayn't we have been dunning?
mayn't you have been dunning?
mayn't they have been dunning?