could shellac
Verbo regular: shellac - shellaced- shellaced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could shellac
you could shellac
he could shellac
we could shellac
you could shellac
they could shellac 	I could be shellacing
you could be shellacing
he could be shellacing
we could be shellacing
you could be shellacing
they could be shellacing	I could have shellaced
you could have shellaced
he could have shellaced
we could have shellaced
you could have shellaced
they could have shellaced	I could have been shellacing
you could have been shellacing
he could have been shellacing
we could have been shellacing
you could have been shellacing
they could have been shellacing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not shellac
you could not shellac
he could not shellac
we could not shellac
you could not shellac
they could not shellac 	I could not be shellacing
you could not be shellacing
he could not be shellacing
we could not be shellacing
you could not be shellacing
they could not be shellacing	I could not have shellaced
you could not have shellaced
he could not have shellaced
we could not have shellaced
you could not have shellaced
they could not have shellaced	I could not have been shellacing
you could not have been shellacing
he could not have been shellacing
we could not have been shellacing
you could not have been shellacing
they could not have been shellacing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I shellac?
could you shellac?
could he shellac?
could we shellac?
could you shellac?
could they shellac? 	could I be shellacing?
could you be shellacing?
could he be shellacing?
could we be shellacing?
could you be shellacing?
could they be shellacing? 	could I have shellaced?
could you have shellaced?
could he have shellaced?
could we have shellaced?
could you have shellaced?
could they have shellaced? 	could I have been shellacing?
could you have been shellacing?
could he have been shellacing?
could we have been shellacing?
could you have been shellacing?
could they have been shellacing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not shellac?
could you not shellac?
could he not shellac?
could we not shellac?
could you not shellac?
could they not shellac? 	could I not be shellacing?
could you not be shellacing?
could he not be shellacing?
could we not be shellacing?
could you not be shellacing?
could they not be shellacing? 	could I not have shellaced?
could you not have shellaced?
could he not have shellaced?
could we not have shellaced?
could you not have shellaced?
could they not have shellaced? 	could I not have been shellacing?
could you not have been shellacing?
could he not have been shellacing?
could we not have been shellacing?
could you not have been shellacing?
could they not have been shellacing?