could unbind
Irregular verb: unbind - unbound- unbound

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unbind
you could unbind
he could unbind
we could unbind
you could unbind
they could unbind 	I could be unbinding
you could be unbinding
he could be unbinding
we could be unbinding
you could be unbinding
they could be unbinding	I could have unbound
you could have unbound
he could have unbound
we could have unbound
you could have unbound
they could have unbound	I could have been unbinding
you could have been unbinding
he could have been unbinding
we could have been unbinding
you could have been unbinding
they could have been unbinding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not unbind
you could not unbind
he could not unbind
we could not unbind
you could not unbind
they could not unbind 	I could not be unbinding
you could not be unbinding
he could not be unbinding
we could not be unbinding
you could not be unbinding
they could not be unbinding	I could not have unbound
you could not have unbound
he could not have unbound
we could not have unbound
you could not have unbound
they could not have unbound	I could not have been unbinding
you could not have been unbinding
he could not have been unbinding
we could not have been unbinding
you could not have been unbinding
they could not have been unbinding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unbind?
could you unbind?
could he unbind?
could we unbind?
could you unbind?
could they unbind? 	could I be unbinding?
could you be unbinding?
could he be unbinding?
could we be unbinding?
could you be unbinding?
could they be unbinding? 	could I have unbound?
could you have unbound?
could he have unbound?
could we have unbound?
could you have unbound?
could they have unbound? 	could I have been unbinding?
could you have been unbinding?
could he have been unbinding?
could we have been unbinding?
could you have been unbinding?
could they have been unbinding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not unbind?
could you not unbind?
could he not unbind?
could we not unbind?
could you not unbind?
could they not unbind? 	could I not be unbinding?
could you not be unbinding?
could he not be unbinding?
could we not be unbinding?
could you not be unbinding?
could they not be unbinding? 	could I not have unbound?
could you not have unbound?
could he not have unbound?
could we not have unbound?
could you not have unbound?
could they not have unbound? 	could I not have been unbinding?
could you not have been unbinding?
could he not have been unbinding?
could we not have been unbinding?
could you not have been unbinding?
could they not have been unbinding?