I could contact you could contact he could contact we could contact you could contact they could contact
Forma con V-ing
I could be contacting you could be contacting he could be contacting we could be contacting you could be contacting they could be contacting
Perfecto
I could have contacted you could have contacted he could have contacted we could have contacted you could have contacted they could have contacted
Perfecto con V-ing
I could have been contacting you could have been contacting he could have been contacting we could have been contacting you could have been contacting they could have been contacting
Negación
Forma simple
I could not contact you could not contact he could not contact we could not contact you could not contact they could not contact
Forma con V-ing
I could not be contacting you could not be contacting he could not be contacting we could not be contacting you could not be contacting they could not be contacting
Perfecto
I could not have contacted you could not have contacted he could not have contacted we could not have contacted you could not have contacted they could not have contacted
Perfecto con V-ing
I could not have been contacting you could not have been contacting he could not have been contacting we could not have been contacting you could not have been contacting they could not have been contacting
Forma interrogativa
Forma simple
could I contact? could you contact? could he contact? could we contact? could you contact? could they contact?
Forma con V-ing
could I be contacting? could you be contacting? could he be contacting? could we be contacting? could you be contacting? could they be contacting?
Perfecto
could I have contacted? could you have contacted? could he have contacted? could we have contacted? could you have contacted? could they have contacted?
Perfecto con V-ing
could I have been contacting? could you have been contacting? could he have been contacting? could we have been contacting? could you have been contacting? could they have been contacting?
Forma interro-negativa
Forma simple
could I not contact? could you not contact? could he not contact? could we not contact? could you not contact? could they not contact?
Forma con V-ing
could I not be contacting? could you not be contacting? could he not be contacting? could we not be contacting? could you not be contacting? could they not be contacting?
Perfecto
could I not have contacted? could you not have contacted? could he not have contacted? could we not have contacted? could you not have contacted? could they not have contacted?
Perfecto con V-ing
could I not have been contacting? could you not have been contacting? could he not have been contacting? could we not have been contacting? could you not have been contacting? could they not have been contacting?