I could web you could web he could web we could web you could web they could web
Forma con V-ing
I could be webing you could be webing he could be webing we could be webing you could be webing they could be webing
Perfecto
I could have webed you could have webed he could have webed we could have webed you could have webed they could have webed
Perfecto con V-ing
I could have been webing you could have been webing he could have been webing we could have been webing you could have been webing they could have been webing
Negación
Forma simple
I could not web you could not web he could not web we could not web you could not web they could not web
Forma con V-ing
I could not be webing you could not be webing he could not be webing we could not be webing you could not be webing they could not be webing
Perfecto
I could not have webed you could not have webed he could not have webed we could not have webed you could not have webed they could not have webed
Perfecto con V-ing
I could not have been webing you could not have been webing he could not have been webing we could not have been webing you could not have been webing they could not have been webing
Forma interrogativa
Forma simple
could I web? could you web? could he web? could we web? could you web? could they web?
Forma con V-ing
could I be webing? could you be webing? could he be webing? could we be webing? could you be webing? could they be webing?
Perfecto
could I have webed? could you have webed? could he have webed? could we have webed? could you have webed? could they have webed?
Perfecto con V-ing
could I have been webing? could you have been webing? could he have been webing? could we have been webing? could you have been webing? could they have been webing?
Forma interro-negativa
Forma simple
could I not web? could you not web? could he not web? could we not web? could you not web? could they not web?
Forma con V-ing
could I not be webing? could you not be webing? could he not be webing? could we not be webing? could you not be webing? could they not be webing?
Perfecto
could I not have webed? could you not have webed? could he not have webed? could we not have webed? could you not have webed? could they not have webed?
Perfecto con V-ing
could I not have been webing? could you not have been webing? could he not have been webing? could we not have been webing? could you not have been webing? could they not have been webing?