may concede
Regular verb: concede - conceded- conceded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may concede
you may concede
she may concede
we may concede
you may concede
they may concede 	I may be conceding
you may be conceding
she may be conceding
we may be conceding
you may be conceding
they may be conceding	I may have conceded
you may have conceded
she may have conceded
we may have conceded
you may have conceded
they may have conceded	I may have been conceding
you may have been conceding
she may have been conceding
we may have been conceding
you may have been conceding
they may have been conceding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't concede
you mayn't concede
she mayn't concede
we mayn't concede
you mayn't concede
they mayn't concede 	I mayn't be conceding
you mayn't be conceding
she mayn't be conceding
we mayn't be conceding
you mayn't be conceding
they mayn't be conceding	I mayn't have conceded
you mayn't have conceded
she mayn't have conceded
we mayn't have conceded
you mayn't have conceded
they mayn't have conceded	I mayn't have been conceding
you mayn't have been conceding
she mayn't have been conceding
we mayn't have been conceding
you mayn't have been conceding
they mayn't have been conceding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I concede?
may you concede?
may she concede?
may we concede?
may you concede?
may they concede? 	may I be conceding?
may you be conceding?
may she be conceding?
may we be conceding?
may you be conceding?
may they be conceding? 	may I have conceded?
may you have conceded?
may she have conceded?
may we have conceded?
may you have conceded?
may they have conceded? 	may I have been conceding?
may you have been conceding?
may she have been conceding?
may we have been conceding?
may you have been conceding?
may they have been conceding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I concede?
mayn't you concede?
mayn't she concede?
mayn't we concede?
mayn't you concede?
mayn't they concede? 	mayn't I be conceding?
mayn't you be conceding?
mayn't she be conceding?
mayn't we be conceding?
mayn't you be conceding?
mayn't they be conceding? 	mayn't I have conceded?
mayn't you have conceded?
mayn't she have conceded?
mayn't we have conceded?
mayn't you have conceded?
mayn't they have conceded? 	mayn't I have been conceding?
mayn't you have been conceding?
mayn't she have been conceding?
mayn't we have been conceding?
mayn't you have been conceding?
mayn't they have been conceding?