may stump
Regular verb: stump - stumped- stumped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may stump
you may stump
she may stump
we may stump
you may stump
they may stump 	I may be stumping
you may be stumping
she may be stumping
we may be stumping
you may be stumping
they may be stumping	I may have stumped
you may have stumped
she may have stumped
we may have stumped
you may have stumped
they may have stumped	I may have been stumping
you may have been stumping
she may have been stumping
we may have been stumping
you may have been stumping
they may have been stumping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't stump
you mayn't stump
she mayn't stump
we mayn't stump
you mayn't stump
they mayn't stump 	I mayn't be stumping
you mayn't be stumping
she mayn't be stumping
we mayn't be stumping
you mayn't be stumping
they mayn't be stumping	I mayn't have stumped
you mayn't have stumped
she mayn't have stumped
we mayn't have stumped
you mayn't have stumped
they mayn't have stumped	I mayn't have been stumping
you mayn't have been stumping
she mayn't have been stumping
we mayn't have been stumping
you mayn't have been stumping
they mayn't have been stumping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I stump?
may you stump?
may she stump?
may we stump?
may you stump?
may they stump? 	may I be stumping?
may you be stumping?
may she be stumping?
may we be stumping?
may you be stumping?
may they be stumping? 	may I have stumped?
may you have stumped?
may she have stumped?
may we have stumped?
may you have stumped?
may they have stumped? 	may I have been stumping?
may you have been stumping?
may she have been stumping?
may we have been stumping?
may you have been stumping?
may they have been stumping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I stump?
mayn't you stump?
mayn't she stump?
mayn't we stump?
mayn't you stump?
mayn't they stump? 	mayn't I be stumping?
mayn't you be stumping?
mayn't she be stumping?
mayn't we be stumping?
mayn't you be stumping?
mayn't they be stumping? 	mayn't I have stumped?
mayn't you have stumped?
mayn't she have stumped?
mayn't we have stumped?
mayn't you have stumped?
mayn't they have stumped? 	mayn't I have been stumping?
mayn't you have been stumping?
mayn't she have been stumping?
mayn't we have been stumping?
mayn't you have been stumping?
mayn't they have been stumping?