could unbolt
Verbo regular: unbolt - unbolted- unbolted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could unbolt
you could unbolt
she could unbolt
we could unbolt
you could unbolt
they could unbolt 	I could be unbolting
you could be unbolting
she could be unbolting
we could be unbolting
you could be unbolting
they could be unbolting	I could have unbolted
you could have unbolted
she could have unbolted
we could have unbolted
you could have unbolted
they could have unbolted	I could have been unbolting
you could have been unbolting
she could have been unbolting
we could have been unbolting
you could have been unbolting
they could have been unbolting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not unbolt
you could not unbolt
she could not unbolt
we could not unbolt
you could not unbolt
they could not unbolt 	I could not be unbolting
you could not be unbolting
she could not be unbolting
we could not be unbolting
you could not be unbolting
they could not be unbolting	I could not have unbolted
you could not have unbolted
she could not have unbolted
we could not have unbolted
you could not have unbolted
they could not have unbolted	I could not have been unbolting
you could not have been unbolting
she could not have been unbolting
we could not have been unbolting
you could not have been unbolting
they could not have been unbolting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I unbolt?
could you unbolt?
could she unbolt?
could we unbolt?
could you unbolt?
could they unbolt? 	could I be unbolting?
could you be unbolting?
could she be unbolting?
could we be unbolting?
could you be unbolting?
could they be unbolting? 	could I have unbolted?
could you have unbolted?
could she have unbolted?
could we have unbolted?
could you have unbolted?
could they have unbolted? 	could I have been unbolting?
could you have been unbolting?
could she have been unbolting?
could we have been unbolting?
could you have been unbolting?
could they have been unbolting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not unbolt?
could you not unbolt?
could she not unbolt?
could we not unbolt?
could you not unbolt?
could they not unbolt? 	could I not be unbolting?
could you not be unbolting?
could she not be unbolting?
could we not be unbolting?
could you not be unbolting?
could they not be unbolting? 	could I not have unbolted?
could you not have unbolted?
could she not have unbolted?
could we not have unbolted?
could you not have unbolted?
could they not have unbolted? 	could I not have been unbolting?
could you not have been unbolting?
could she not have been unbolting?
could we not have been unbolting?
could you not have been unbolting?
could they not have been unbolting?