may unbutton
Verbo regular: unbutton - unbuttoned- unbuttoned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may unbutton
you may unbutton
she may unbutton
we may unbutton
you may unbutton
they may unbutton 	I may be unbuttoning
you may be unbuttoning
she may be unbuttoning
we may be unbuttoning
you may be unbuttoning
they may be unbuttoning	I may have unbuttoned
you may have unbuttoned
she may have unbuttoned
we may have unbuttoned
you may have unbuttoned
they may have unbuttoned	I may have been unbuttoning
you may have been unbuttoning
she may have been unbuttoning
we may have been unbuttoning
you may have been unbuttoning
they may have been unbuttoning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mayn't unbutton
you mayn't unbutton
she mayn't unbutton
we mayn't unbutton
you mayn't unbutton
they mayn't unbutton 	I mayn't be unbuttoning
you mayn't be unbuttoning
she mayn't be unbuttoning
we mayn't be unbuttoning
you mayn't be unbuttoning
they mayn't be unbuttoning	I mayn't have unbuttoned
you mayn't have unbuttoned
she mayn't have unbuttoned
we mayn't have unbuttoned
you mayn't have unbuttoned
they mayn't have unbuttoned	I mayn't have been unbuttoning
you mayn't have been unbuttoning
she mayn't have been unbuttoning
we mayn't have been unbuttoning
you mayn't have been unbuttoning
they mayn't have been unbuttoning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I unbutton?
may you unbutton?
may she unbutton?
may we unbutton?
may you unbutton?
may they unbutton? 	may I be unbuttoning?
may you be unbuttoning?
may she be unbuttoning?
may we be unbuttoning?
may you be unbuttoning?
may they be unbuttoning? 	may I have unbuttoned?
may you have unbuttoned?
may she have unbuttoned?
may we have unbuttoned?
may you have unbuttoned?
may they have unbuttoned? 	may I have been unbuttoning?
may you have been unbuttoning?
may she have been unbuttoning?
may we have been unbuttoning?
may you have been unbuttoning?
may they have been unbuttoning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mayn't I unbutton?
mayn't you unbutton?
mayn't she unbutton?
mayn't we unbutton?
mayn't you unbutton?
mayn't they unbutton? 	mayn't I be unbuttoning?
mayn't you be unbuttoning?
mayn't she be unbuttoning?
mayn't we be unbuttoning?
mayn't you be unbuttoning?
mayn't they be unbuttoning? 	mayn't I have unbuttoned?
mayn't you have unbuttoned?
mayn't she have unbuttoned?
mayn't we have unbuttoned?
mayn't you have unbuttoned?
mayn't they have unbuttoned? 	mayn't I have been unbuttoning?
mayn't you have been unbuttoning?
mayn't she have been unbuttoning?
mayn't we have been unbuttoning?
mayn't you have been unbuttoning?
mayn't they have been unbuttoning?