may unfasten
Verbo regular: unfasten - unfastened- unfastened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may unfasten
you may unfasten
she may unfasten
we may unfasten
you may unfasten
they may unfasten 	I may be unfastening
you may be unfastening
she may be unfastening
we may be unfastening
you may be unfastening
they may be unfastening	I may have unfastened
you may have unfastened
she may have unfastened
we may have unfastened
you may have unfastened
they may have unfastened	I may have been unfastening
you may have been unfastening
she may have been unfastening
we may have been unfastening
you may have been unfastening
they may have been unfastening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mayn't unfasten
you mayn't unfasten
she mayn't unfasten
we mayn't unfasten
you mayn't unfasten
they mayn't unfasten 	I mayn't be unfastening
you mayn't be unfastening
she mayn't be unfastening
we mayn't be unfastening
you mayn't be unfastening
they mayn't be unfastening	I mayn't have unfastened
you mayn't have unfastened
she mayn't have unfastened
we mayn't have unfastened
you mayn't have unfastened
they mayn't have unfastened	I mayn't have been unfastening
you mayn't have been unfastening
she mayn't have been unfastening
we mayn't have been unfastening
you mayn't have been unfastening
they mayn't have been unfastening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I unfasten?
may you unfasten?
may she unfasten?
may we unfasten?
may you unfasten?
may they unfasten? 	may I be unfastening?
may you be unfastening?
may she be unfastening?
may we be unfastening?
may you be unfastening?
may they be unfastening? 	may I have unfastened?
may you have unfastened?
may she have unfastened?
may we have unfastened?
may you have unfastened?
may they have unfastened? 	may I have been unfastening?
may you have been unfastening?
may she have been unfastening?
may we have been unfastening?
may you have been unfastening?
may they have been unfastening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mayn't I unfasten?
mayn't you unfasten?
mayn't she unfasten?
mayn't we unfasten?
mayn't you unfasten?
mayn't they unfasten? 	mayn't I be unfastening?
mayn't you be unfastening?
mayn't she be unfastening?
mayn't we be unfastening?
mayn't you be unfastening?
mayn't they be unfastening? 	mayn't I have unfastened?
mayn't you have unfastened?
mayn't she have unfastened?
mayn't we have unfastened?
mayn't you have unfastened?
mayn't they have unfastened? 	mayn't I have been unfastening?
mayn't you have been unfastening?
mayn't she have been unfastening?
mayn't we have been unfastening?
mayn't you have been unfastening?
mayn't they have been unfastening?