could cough
Verbo regular: cough - coughed- coughed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could cough
you could cough
he could cough
we could cough
you could cough
they could cough 	I could be coughing
you could be coughing
he could be coughing
we could be coughing
you could be coughing
they could be coughing	I could have coughed
you could have coughed
he could have coughed
we could have coughed
you could have coughed
they could have coughed	I could have been coughing
you could have been coughing
he could have been coughing
we could have been coughing
you could have been coughing
they could have been coughing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not cough
you could not cough
he could not cough
we could not cough
you could not cough
they could not cough 	I could not be coughing
you could not be coughing
he could not be coughing
we could not be coughing
you could not be coughing
they could not be coughing	I could not have coughed
you could not have coughed
he could not have coughed
we could not have coughed
you could not have coughed
they could not have coughed	I could not have been coughing
you could not have been coughing
he could not have been coughing
we could not have been coughing
you could not have been coughing
they could not have been coughing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I cough?
could you cough?
could he cough?
could we cough?
could you cough?
could they cough? 	could I be coughing?
could you be coughing?
could he be coughing?
could we be coughing?
could you be coughing?
could they be coughing? 	could I have coughed?
could you have coughed?
could he have coughed?
could we have coughed?
could you have coughed?
could they have coughed? 	could I have been coughing?
could you have been coughing?
could he have been coughing?
could we have been coughing?
could you have been coughing?
could they have been coughing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not cough?
could you not cough?
could he not cough?
could we not cough?
could you not cough?
could they not cough? 	could I not be coughing?
could you not be coughing?
could he not be coughing?
could we not be coughing?
could you not be coughing?
could they not be coughing? 	could I not have coughed?
could you not have coughed?
could he not have coughed?
could we not have coughed?
could you not have coughed?
could they not have coughed? 	could I not have been coughing?
could you not have been coughing?
could he not have been coughing?
could we not have been coughing?
could you not have been coughing?
could they not have been coughing?