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 couldn't spoke you couldn't spoke he couldn't spoke we couldn't spoke you couldn't spoke they couldn't spoke
V-ing form
I couldn't be spoking you couldn't be spoking he couldn't be spoking we couldn't be spoking you couldn't be spoking they couldn't be spoking
Perfect
I couldn't have spoked you couldn't have spoked he couldn't have spoked we couldn't have spoked you couldn't have spoked they couldn't have spoked
V-ing perfect
I couldn't have been spoking you couldn't have been spoking he couldn't have been spoking we couldn't have been spoking you couldn't have been spoking they couldn't 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
couldn't I spoke? couldn't you spoke? couldn't he spoke? couldn't we spoke? couldn't you spoke? couldn't they spoke?
V-ing form
couldn't I be spoking? couldn't you be spoking? couldn't he be spoking? couldn't we be spoking? couldn't you be spoking? couldn't they be spoking?
Perfect
couldn't I have spoked? couldn't you have spoked? couldn't he have spoked? couldn't we have spoked? couldn't you have spoked? couldn't they have spoked?
V-ing perfect
couldn't I have been spoking? couldn't you have been spoking? couldn't he have been spoking? couldn't we have been spoking? couldn't you have been spoking? couldn't they have been spoking?