could unlace
Verbo regular: unlace - unlaced- unlaced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could unlace
you could unlace
he could unlace
we could unlace
you could unlace
they could unlace 	I could be unlacing
you could be unlacing
he could be unlacing
we could be unlacing
you could be unlacing
they could be unlacing	I could have unlaced
you could have unlaced
he could have unlaced
we could have unlaced
you could have unlaced
they could have unlaced	I could have been unlacing
you could have been unlacing
he could have been unlacing
we could have been unlacing
you could have been unlacing
they could have been unlacing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not unlace
you could not unlace
he could not unlace
we could not unlace
you could not unlace
they could not unlace 	I could not be unlacing
you could not be unlacing
he could not be unlacing
we could not be unlacing
you could not be unlacing
they could not be unlacing	I could not have unlaced
you could not have unlaced
he could not have unlaced
we could not have unlaced
you could not have unlaced
they could not have unlaced	I could not have been unlacing
you could not have been unlacing
he could not have been unlacing
we could not have been unlacing
you could not have been unlacing
they could not have been unlacing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I unlace?
could you unlace?
could he unlace?
could we unlace?
could you unlace?
could they unlace? 	could I be unlacing?
could you be unlacing?
could he be unlacing?
could we be unlacing?
could you be unlacing?
could they be unlacing? 	could I have unlaced?
could you have unlaced?
could he have unlaced?
could we have unlaced?
could you have unlaced?
could they have unlaced? 	could I have been unlacing?
could you have been unlacing?
could he have been unlacing?
could we have been unlacing?
could you have been unlacing?
could they have been unlacing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not unlace?
could you not unlace?
could he not unlace?
could we not unlace?
could you not unlace?
could they not unlace? 	could I not be unlacing?
could you not be unlacing?
could he not be unlacing?
could we not be unlacing?
could you not be unlacing?
could they not be unlacing? 	could I not have unlaced?
could you not have unlaced?
could he not have unlaced?
could we not have unlaced?
could you not have unlaced?
could they not have unlaced? 	could I not have been unlacing?
could you not have been unlacing?
could he not have been unlacing?
could we not have been unlacing?
could you not have been unlacing?
could they not have been unlacing?