may keen
Regular verb: keen - keened- keened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may keen
you may keen
she may keen
we may keen
you may keen
they may keen 	I may be keening
you may be keening
she may be keening
we may be keening
you may be keening
they may be keening	I may have keened
you may have keened
she may have keened
we may have keened
you may have keened
they may have keened	I may have been keening
you may have been keening
she may have been keening
we may have been keening
you may have been keening
they may have been keening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't keen
you mayn't keen
she mayn't keen
we mayn't keen
you mayn't keen
they mayn't keen 	I mayn't be keening
you mayn't be keening
she mayn't be keening
we mayn't be keening
you mayn't be keening
they mayn't be keening	I mayn't have keened
you mayn't have keened
she mayn't have keened
we mayn't have keened
you mayn't have keened
they mayn't have keened	I mayn't have been keening
you mayn't have been keening
she mayn't have been keening
we mayn't have been keening
you mayn't have been keening
they mayn't have been keening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I keen?
may you keen?
may she keen?
may we keen?
may you keen?
may they keen? 	may I be keening?
may you be keening?
may she be keening?
may we be keening?
may you be keening?
may they be keening? 	may I have keened?
may you have keened?
may she have keened?
may we have keened?
may you have keened?
may they have keened? 	may I have been keening?
may you have been keening?
may she have been keening?
may we have been keening?
may you have been keening?
may they have been keening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I keen?
mayn't you keen?
mayn't she keen?
mayn't we keen?
mayn't you keen?
mayn't they keen? 	mayn't I be keening?
mayn't you be keening?
mayn't she be keening?
mayn't we be keening?
mayn't you be keening?
mayn't they be keening? 	mayn't I have keened?
mayn't you have keened?
mayn't she have keened?
mayn't we have keened?
mayn't you have keened?
mayn't they have keened? 	mayn't I have been keening?
mayn't you have been keening?
mayn't she have been keening?
mayn't we have been keening?
mayn't you have been keening?
mayn't they have been keening?