I could spoke you could spoke he could spoke we could spoke you could spoke they could spoke
V-ing form
I could be spoking you could be spoking he could be spoking we could be spoking you could be spoking they could be spoking
Perfect
I could have spoked you could have spoked he could have spoked we could have spoked you could have spoked they could have spoked
V-ing perfect
I could have been spoking you could have been spoking he could have been spoking we could have been spoking you could have been spoking they could have been spoking
Negation
Simple form
I could not spoke you could not spoke he could not spoke we could not spoke you could not spoke they could not spoke
V-ing form
I could not be spoking you could not be spoking he could not be spoking we could not be spoking you could not be spoking they could not be spoking
Perfect
I could not have spoked you could not have spoked he could not have spoked we could not have spoked you could not have spoked they could not have spoked
V-ing perfect
I could not have been spoking you could not have been spoking he could not have been spoking we could not have been spoking you could not have been spoking they could not have been spoking
Interrogative form
Simple form
could I spoke? could you spoke? could he spoke? could we spoke? could you spoke? could they spoke?
V-ing form
could I be spoking? could you be spoking? could he be spoking? could we be spoking? could you be spoking? could they be spoking?
Perfect
could I have spoked? could you have spoked? could he have spoked? could we have spoked? could you have spoked? could they have spoked?
V-ing perfect
could I have been spoking? could you have been spoking? could he have been spoking? could we have been spoking? could you have been spoking? could they have been spoking?
Interro-negative form
Simple form
could I not spoke? could you not spoke? could he not spoke? could we not spoke? could you not spoke? could they not spoke?
V-ing form
could I not be spoking? could you not be spoking? could he not be spoking? could we not be spoking? could you not be spoking? could they not be spoking?
Perfect
could I not have spoked? could you not have spoked? could he not have spoked? could we not have spoked? could you not have spoked? could they not have spoked?
V-ing perfect
could I not have been spoking? could you not have been spoking? could he not have been spoking? could we not have been spoking? could you not have been spoking? could they not have been spoking?