may button
Regular verb: button - buttoned- buttoned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may button
you may button
she may button
we may button
you may button
they may button 	I may be buttoning
you may be buttoning
she may be buttoning
we may be buttoning
you may be buttoning
they may be buttoning	I may have buttoned
you may have buttoned
she may have buttoned
we may have buttoned
you may have buttoned
they may have buttoned	I may have been buttoning
you may have been buttoning
she may have been buttoning
we may have been buttoning
you may have been buttoning
they may have been buttoning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't button
you mayn't button
she mayn't button
we mayn't button
you mayn't button
they mayn't button 	I mayn't be buttoning
you mayn't be buttoning
she mayn't be buttoning
we mayn't be buttoning
you mayn't be buttoning
they mayn't be buttoning	I mayn't have buttoned
you mayn't have buttoned
she mayn't have buttoned
we mayn't have buttoned
you mayn't have buttoned
they mayn't have buttoned	I mayn't have been buttoning
you mayn't have been buttoning
she mayn't have been buttoning
we mayn't have been buttoning
you mayn't have been buttoning
they mayn't have been buttoning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I button?
may you button?
may she button?
may we button?
may you button?
may they button? 	may I be buttoning?
may you be buttoning?
may she be buttoning?
may we be buttoning?
may you be buttoning?
may they be buttoning? 	may I have buttoned?
may you have buttoned?
may she have buttoned?
may we have buttoned?
may you have buttoned?
may they have buttoned? 	may I have been buttoning?
may you have been buttoning?
may she have been buttoning?
may we have been buttoning?
may you have been buttoning?
may they have been buttoning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I button?
mayn't you button?
mayn't she button?
mayn't we button?
mayn't you button?
mayn't they button? 	mayn't I be buttoning?
mayn't you be buttoning?
mayn't she be buttoning?
mayn't we be buttoning?
mayn't you be buttoning?
mayn't they be buttoning? 	mayn't I have buttoned?
mayn't you have buttoned?
mayn't she have buttoned?
mayn't we have buttoned?
mayn't you have buttoned?
mayn't they have buttoned? 	mayn't I have been buttoning?
mayn't you have been buttoning?
mayn't she have been buttoning?
mayn't we have been buttoning?
mayn't you have been buttoning?
mayn't they have been buttoning?