I could defend you could defend he could defend we could defend you could defend they could defend
Forma con V-ing
I could be defending you could be defending he could be defending we could be defending you could be defending they could be defending
Perfecto
I could have defended you could have defended he could have defended we could have defended you could have defended they could have defended
Perfecto con V-ing
I could have been defending you could have been defending he could have been defending we could have been defending you could have been defending they could have been defending
Negación
Forma simple
I could not defend you could not defend he could not defend we could not defend you could not defend they could not defend
Forma con V-ing
I could not be defending you could not be defending he could not be defending we could not be defending you could not be defending they could not be defending
Perfecto
I could not have defended you could not have defended he could not have defended we could not have defended you could not have defended they could not have defended
Perfecto con V-ing
I could not have been defending you could not have been defending he could not have been defending we could not have been defending you could not have been defending they could not have been defending
Forma interrogativa
Forma simple
could I defend? could you defend? could he defend? could we defend? could you defend? could they defend?
Forma con V-ing
could I be defending? could you be defending? could he be defending? could we be defending? could you be defending? could they be defending?
Perfecto
could I have defended? could you have defended? could he have defended? could we have defended? could you have defended? could they have defended?
Perfecto con V-ing
could I have been defending? could you have been defending? could he have been defending? could we have been defending? could you have been defending? could they have been defending?
Forma interro-negativa
Forma simple
could I not defend? could you not defend? could he not defend? could we not defend? could you not defend? could they not defend?
Forma con V-ing
could I not be defending? could you not be defending? could he not be defending? could we not be defending? could you not be defending? could they not be defending?
Perfecto
could I not have defended? could you not have defended? could he not have defended? could we not have defended? could you not have defended? could they not have defended?
Perfecto con V-ing
could I not have been defending? could you not have been defending? could he not have been defending? could we not have been defending? could you not have been defending? could they not have been defending?