could untie
Verbo regular: untie - untied- untied

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could untie
you could untie
she could untie
we could untie
you could untie
they could untie 	I could be untying
you could be untying
she could be untying
we could be untying
you could be untying
they could be untying	I could have untied
you could have untied
she could have untied
we could have untied
you could have untied
they could have untied	I could have been untying
you could have been untying
she could have been untying
we could have been untying
you could have been untying
they could have been untying	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not untie
you could not untie
she could not untie
we could not untie
you could not untie
they could not untie 	I could not be untying
you could not be untying
she could not be untying
we could not be untying
you could not be untying
they could not be untying	I could not have untied
you could not have untied
she could not have untied
we could not have untied
you could not have untied
they could not have untied	I could not have been untying
you could not have been untying
she could not have been untying
we could not have been untying
you could not have been untying
they could not have been untying	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I untie?
could you untie?
could she untie?
could we untie?
could you untie?
could they untie? 	could I be untying?
could you be untying?
could she be untying?
could we be untying?
could you be untying?
could they be untying? 	could I have untied?
could you have untied?
could she have untied?
could we have untied?
could you have untied?
could they have untied? 	could I have been untying?
could you have been untying?
could she have been untying?
could we have been untying?
could you have been untying?
could they have been untying? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not untie?
could you not untie?
could she not untie?
could we not untie?
could you not untie?
could they not untie? 	could I not be untying?
could you not be untying?
could she not be untying?
could we not be untying?
could you not be untying?
could they not be untying? 	could I not have untied?
could you not have untied?
could she not have untied?
could we not have untied?
could you not have untied?
could they not have untied? 	could I not have been untying?
could you not have been untying?
could she not have been untying?
could we not have been untying?
could you not have been untying?
could they not have been untying?