could corkscrew
Verbo regular: corkscrew - corkscrewed- corkscrewed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could corkscrew
you could corkscrew
he could corkscrew
we could corkscrew
you could corkscrew
they could corkscrew 	I could be corkscrewing
you could be corkscrewing
he could be corkscrewing
we could be corkscrewing
you could be corkscrewing
they could be corkscrewing	I could have corkscrewed
you could have corkscrewed
he could have corkscrewed
we could have corkscrewed
you could have corkscrewed
they could have corkscrewed	I could have been corkscrewing
you could have been corkscrewing
he could have been corkscrewing
we could have been corkscrewing
you could have been corkscrewing
they could have been corkscrewing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not corkscrew
you could not corkscrew
he could not corkscrew
we could not corkscrew
you could not corkscrew
they could not corkscrew 	I could not be corkscrewing
you could not be corkscrewing
he could not be corkscrewing
we could not be corkscrewing
you could not be corkscrewing
they could not be corkscrewing	I could not have corkscrewed
you could not have corkscrewed
he could not have corkscrewed
we could not have corkscrewed
you could not have corkscrewed
they could not have corkscrewed	I could not have been corkscrewing
you could not have been corkscrewing
he could not have been corkscrewing
we could not have been corkscrewing
you could not have been corkscrewing
they could not have been corkscrewing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I corkscrew?
could you corkscrew?
could he corkscrew?
could we corkscrew?
could you corkscrew?
could they corkscrew? 	could I be corkscrewing?
could you be corkscrewing?
could he be corkscrewing?
could we be corkscrewing?
could you be corkscrewing?
could they be corkscrewing? 	could I have corkscrewed?
could you have corkscrewed?
could he have corkscrewed?
could we have corkscrewed?
could you have corkscrewed?
could they have corkscrewed? 	could I have been corkscrewing?
could you have been corkscrewing?
could he have been corkscrewing?
could we have been corkscrewing?
could you have been corkscrewing?
could they have been corkscrewing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not corkscrew?
could you not corkscrew?
could he not corkscrew?
could we not corkscrew?
could you not corkscrew?
could they not corkscrew? 	could I not be corkscrewing?
could you not be corkscrewing?
could he not be corkscrewing?
could we not be corkscrewing?
could you not be corkscrewing?
could they not be corkscrewing? 	could I not have corkscrewed?
could you not have corkscrewed?
could he not have corkscrewed?
could we not have corkscrewed?
could you not have corkscrewed?
could they not have corkscrewed? 	could I not have been corkscrewing?
could you not have been corkscrewing?
could he not have been corkscrewing?
could we not have been corkscrewing?
could you not have been corkscrewing?
could they not have been corkscrewing?