I could ta you could ta he could ta we could ta you could ta they could ta
Forma con V-ing
I could be taing you could be taing he could be taing we could be taing you could be taing they could be taing
Perfecto
I could have taed you could have taed he could have taed we could have taed you could have taed they could have taed
Perfecto con V-ing
I could have been taing you could have been taing he could have been taing we could have been taing you could have been taing they could have been taing
Negación
Forma simple
I could not ta you could not ta he could not ta we could not ta you could not ta they could not ta
Forma con V-ing
I could not be taing you could not be taing he could not be taing we could not be taing you could not be taing they could not be taing
Perfecto
I could not have taed you could not have taed he could not have taed we could not have taed you could not have taed they could not have taed
Perfecto con V-ing
I could not have been taing you could not have been taing he could not have been taing we could not have been taing you could not have been taing they could not have been taing
Forma interrogativa
Forma simple
could I ta? could you ta? could he ta? could we ta? could you ta? could they ta?
Forma con V-ing
could I be taing? could you be taing? could he be taing? could we be taing? could you be taing? could they be taing?
Perfecto
could I have taed? could you have taed? could he have taed? could we have taed? could you have taed? could they have taed?
Perfecto con V-ing
could I have been taing? could you have been taing? could he have been taing? could we have been taing? could you have been taing? could they have been taing?
Forma interro-negativa
Forma simple
could I not ta? could you not ta? could he not ta? could we not ta? could you not ta? could they not ta?
Forma con V-ing
could I not be taing? could you not be taing? could he not be taing? could we not be taing? could you not be taing? could they not be taing?
Perfecto
could I not have taed? could you not have taed? could he not have taed? could we not have taed? could you not have taed? could they not have taed?
Perfecto con V-ing
could I not have been taing? could you not have been taing? could he not have been taing? could we not have been taing? could you not have been taing? could they not have been taing?