could unbrace
Regular verb: unbrace - unbraced- unbraced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unbrace
you could unbrace
he could unbrace
we could unbrace
you could unbrace
they could unbrace 	I could be unbracing
you could be unbracing
he could be unbracing
we could be unbracing
you could be unbracing
they could be unbracing	I could have unbraced
you could have unbraced
he could have unbraced
we could have unbraced
you could have unbraced
they could have unbraced	I could have been unbracing
you could have been unbracing
he could have been unbracing
we could have been unbracing
you could have been unbracing
they could have been unbracing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not unbrace
you could not unbrace
he could not unbrace
we could not unbrace
you could not unbrace
they could not unbrace 	I could not be unbracing
you could not be unbracing
he could not be unbracing
we could not be unbracing
you could not be unbracing
they could not be unbracing	I could not have unbraced
you could not have unbraced
he could not have unbraced
we could not have unbraced
you could not have unbraced
they could not have unbraced	I could not have been unbracing
you could not have been unbracing
he could not have been unbracing
we could not have been unbracing
you could not have been unbracing
they could not have been unbracing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unbrace?
could you unbrace?
could he unbrace?
could we unbrace?
could you unbrace?
could they unbrace? 	could I be unbracing?
could you be unbracing?
could he be unbracing?
could we be unbracing?
could you be unbracing?
could they be unbracing? 	could I have unbraced?
could you have unbraced?
could he have unbraced?
could we have unbraced?
could you have unbraced?
could they have unbraced? 	could I have been unbracing?
could you have been unbracing?
could he have been unbracing?
could we have been unbracing?
could you have been unbracing?
could they have been unbracing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not unbrace?
could you not unbrace?
could he not unbrace?
could we not unbrace?
could you not unbrace?
could they not unbrace? 	could I not be unbracing?
could you not be unbracing?
could he not be unbracing?
could we not be unbracing?
could you not be unbracing?
could they not be unbracing? 	could I not have unbraced?
could you not have unbraced?
could he not have unbraced?
could we not have unbraced?
could you not have unbraced?
could they not have unbraced? 	could I not have been unbracing?
could you not have been unbracing?
could he not have been unbracing?
could we not have been unbracing?
could you not have been unbracing?
could they not have been unbracing?