I could potroast you could potroast he could potroast we could potroast you could potroast they could potroast
V-ing form
I could be potroasting you could be potroasting he could be potroasting we could be potroasting you could be potroasting they could be potroasting
Perfect
I could have potroasted you could have potroasted he could have potroasted we could have potroasted you could have potroasted they could have potroasted
V-ing perfect
I could have been potroasting you could have been potroasting he could have been potroasting we could have been potroasting you could have been potroasting they could have been potroasting
Negation
Simple form
I could not potroast you could not potroast he could not potroast we could not potroast you could not potroast they could not potroast
V-ing form
I could not be potroasting you could not be potroasting he could not be potroasting we could not be potroasting you could not be potroasting they could not be potroasting
Perfect
I could not have potroasted you could not have potroasted he could not have potroasted we could not have potroasted you could not have potroasted they could not have potroasted
V-ing perfect
I could not have been potroasting you could not have been potroasting he could not have been potroasting we could not have been potroasting you could not have been potroasting they could not have been potroasting
Interrogative form
Simple form
could I potroast? could you potroast? could he potroast? could we potroast? could you potroast? could they potroast?
V-ing form
could I be potroasting? could you be potroasting? could he be potroasting? could we be potroasting? could you be potroasting? could they be potroasting?
Perfect
could I have potroasted? could you have potroasted? could he have potroasted? could we have potroasted? could you have potroasted? could they have potroasted?
V-ing perfect
could I have been potroasting? could you have been potroasting? could he have been potroasting? could we have been potroasting? could you have been potroasting? could they have been potroasting?
Interro-negative form
Simple form
could I not potroast? could you not potroast? could he not potroast? could we not potroast? could you not potroast? could they not potroast?
V-ing form
could I not be potroasting? could you not be potroasting? could he not be potroasting? could we not be potroasting? could you not be potroasting? could they not be potroasting?
Perfect
could I not have potroasted? could you not have potroasted? could he not have potroasted? could we not have potroasted? could you not have potroasted? could they not have potroasted?
V-ing perfect
could I not have been potroasting? could you not have been potroasting? could he not have been potroasting? could we not have been potroasting? could you not have been potroasting? could they not have been potroasting?