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 couldn't shellac
you couldn't shellac
he couldn't shellac
we couldn't shellac
you couldn't shellac
they couldn't shellac 	I couldn't be shellacing
you couldn't be shellacing
he couldn't be shellacing
we couldn't be shellacing
you couldn't be shellacing
they couldn't be shellacing	I couldn't have shellaced
you couldn't have shellaced
he couldn't have shellaced
we couldn't have shellaced
you couldn't have shellaced
they couldn't have shellaced	I couldn't have been shellacing
you couldn't have been shellacing
he couldn't have been shellacing
we couldn't have been shellacing
you couldn't have been shellacing
they couldn't 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 	
couldn't I shellac?
couldn't you shellac?
couldn't he shellac?
couldn't we shellac?
couldn't you shellac?
couldn't they shellac? 	couldn't I be shellacing?
couldn't you be shellacing?
couldn't he be shellacing?
couldn't we be shellacing?
couldn't you be shellacing?
couldn't they be shellacing? 	couldn't I have shellaced?
couldn't you have shellaced?
couldn't he have shellaced?
couldn't we have shellaced?
couldn't you have shellaced?
couldn't they have shellaced? 	couldn't I have been shellacing?
couldn't you have been shellacing?
couldn't he have been shellacing?
couldn't we have been shellacing?
couldn't you have been shellacing?
couldn't they have been shellacing?