may unfasten
Regular verb: unfasten - unfastened- unfastened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not unfasten
you may not unfasten
she may not unfasten
we may not unfasten
you may not unfasten
they may not unfasten 	I may not be unfastening
you may not be unfastening
she may not be unfastening
we may not be unfastening
you may not be unfastening
they may not be unfastening	I may not have unfastened
you may not have unfastened
she may not have unfastened
we may not have unfastened
you may not have unfastened
they may not have unfastened	I may not have been unfastening
you may not have been unfastening
she may not have been unfastening
we may not have been unfastening
you may not have been unfastening
they may not have been unfastening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not unfasten?
may you not unfasten?
may she not unfasten?
may we not unfasten?
may you not unfasten?
may they not unfasten? 	may I not be unfastening?
may you not be unfastening?
may she not be unfastening?
may we not be unfastening?
may you not be unfastening?
may they not be unfastening? 	may I not have unfastened?
may you not have unfastened?
may she not have unfastened?
may we not have unfastened?
may you not have unfastened?
may they not have unfastened? 	may I not have been unfastening?
may you not have been unfastening?
may she not have been unfastening?
may we not have been unfastening?
may you not have been unfastening?
may they not have been unfastening?