I could tell you could tell he could tell we could tell you could tell they could tell
Forma con V-ing
I could be telling you could be telling he could be telling we could be telling you could be telling they could be telling
Perfecto
I could have told you could have told he could have told we could have told you could have told they could have told
Perfecto con V-ing
I could have been telling you could have been telling he could have been telling we could have been telling you could have been telling they could have been telling
Negación
Forma simple
I could not tell you could not tell he could not tell we could not tell you could not tell they could not tell
Forma con V-ing
I could not be telling you could not be telling he could not be telling we could not be telling you could not be telling they could not be telling
Perfecto
I could not have told you could not have told he could not have told we could not have told you could not have told they could not have told
Perfecto con V-ing
I could not have been telling you could not have been telling he could not have been telling we could not have been telling you could not have been telling they could not have been telling
Forma interrogativa
Forma simple
could I tell? could you tell? could he tell? could we tell? could you tell? could they tell?
Forma con V-ing
could I be telling? could you be telling? could he be telling? could we be telling? could you be telling? could they be telling?
Perfecto
could I have told? could you have told? could he have told? could we have told? could you have told? could they have told?
Perfecto con V-ing
could I have been telling? could you have been telling? could he have been telling? could we have been telling? could you have been telling? could they have been telling?
Forma interro-negativa
Forma simple
could I not tell? could you not tell? could he not tell? could we not tell? could you not tell? could they not tell?
Forma con V-ing
could I not be telling? could you not be telling? could he not be telling? could we not be telling? could you not be telling? could they not be telling?
Perfecto
could I not have told? could you not have told? could he not have told? could we not have told? could you not have told? could they not have told?
Perfecto con V-ing
could I not have been telling? could you not have been telling? could he not have been telling? could we not have been telling? could you not have been telling? could they not have been telling?