may concert
Regular verb: concert - concerted- concerted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may concert
you may concert
he may concert
we may concert
you may concert
they may concert 	I may be concerting
you may be concerting
he may be concerting
we may be concerting
you may be concerting
they may be concerting	I may have concerted
you may have concerted
he may have concerted
we may have concerted
you may have concerted
they may have concerted	I may have been concerting
you may have been concerting
he may have been concerting
we may have been concerting
you may have been concerting
they may have been concerting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't concert
you mayn't concert
he mayn't concert
we mayn't concert
you mayn't concert
they mayn't concert 	I mayn't be concerting
you mayn't be concerting
he mayn't be concerting
we mayn't be concerting
you mayn't be concerting
they mayn't be concerting	I mayn't have concerted
you mayn't have concerted
he mayn't have concerted
we mayn't have concerted
you mayn't have concerted
they mayn't have concerted	I mayn't have been concerting
you mayn't have been concerting
he mayn't have been concerting
we mayn't have been concerting
you mayn't have been concerting
they mayn't have been concerting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I concert?
may you concert?
may he concert?
may we concert?
may you concert?
may they concert? 	may I be concerting?
may you be concerting?
may he be concerting?
may we be concerting?
may you be concerting?
may they be concerting? 	may I have concerted?
may you have concerted?
may he have concerted?
may we have concerted?
may you have concerted?
may they have concerted? 	may I have been concerting?
may you have been concerting?
may he have been concerting?
may we have been concerting?
may you have been concerting?
may they have been concerting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I concert?
mayn't you concert?
mayn't he concert?
mayn't we concert?
mayn't you concert?
mayn't they concert? 	mayn't I be concerting?
mayn't you be concerting?
mayn't he be concerting?
mayn't we be concerting?
mayn't you be concerting?
mayn't they be concerting? 	mayn't I have concerted?
mayn't you have concerted?
mayn't he have concerted?
mayn't we have concerted?
mayn't you have concerted?
mayn't they have concerted? 	mayn't I have been concerting?
mayn't you have been concerting?
mayn't he have been concerting?
mayn't we have been concerting?
mayn't you have been concerting?
mayn't they have been concerting?