I could author you could author he could author we could author you could author they could author
Forma con V-ing
I could be authoring you could be authoring he could be authoring we could be authoring you could be authoring they could be authoring
Perfetto
I could have authored you could have authored he could have authored we could have authored you could have authored they could have authored
Perfetto con V-ing
I could have been authoring you could have been authoring he could have been authoring we could have been authoring you could have been authoring they could have been authoring
Negazione
Forma semplice
I could not author you could not author he could not author we could not author you could not author they could not author
Forma con V-ing
I could not be authoring you could not be authoring he could not be authoring we could not be authoring you could not be authoring they could not be authoring
Perfetto
I could not have authored you could not have authored he could not have authored we could not have authored you could not have authored they could not have authored
Perfetto con V-ing
I could not have been authoring you could not have been authoring he could not have been authoring we could not have been authoring you could not have been authoring they could not have been authoring
Forma interrogativa
Forma semplice
could I author? could you author? could he author? could we author? could you author? could they author?
Forma con V-ing
could I be authoring? could you be authoring? could he be authoring? could we be authoring? could you be authoring? could they be authoring?
Perfetto
could I have authored? could you have authored? could he have authored? could we have authored? could you have authored? could they have authored?
Perfetto con V-ing
could I have been authoring? could you have been authoring? could he have been authoring? could we have been authoring? could you have been authoring? could they have been authoring?
Forma interro-negativa
Forma semplice
could I not author? could you not author? could he not author? could we not author? could you not author? could they not author?
Forma con V-ing
could I not be authoring? could you not be authoring? could he not be authoring? could we not be authoring? could you not be authoring? could they not be authoring?
Perfetto
could I not have authored? could you not have authored? could he not have authored? could we not have authored? could you not have authored? could they not have authored?
Perfetto con V-ing
could I not have been authoring? could you not have been authoring? could he not have been authoring? could we not have been authoring? could you not have been authoring? could they not have been authoring?