Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could say say you could say say he could say say we could say say you could say say they could say say
V-ing form
I could be say saying you could be say saying he could be say saying we could be say saying you could be say saying they could be say saying
Perfect
I could have say sayed you could have say sayed he could have say sayed we could have say sayed you could have say sayed they could have say sayed
V-ing perfect
I could have been say saying you could have been say saying he could have been say saying we could have been say saying you could have been say saying they could have been say saying
Negation
Simple form
I couldn't say say you couldn't say say he couldn't say say we couldn't say say you couldn't say say they couldn't say say
V-ing form
I couldn't be say saying you couldn't be say saying he couldn't be say saying we couldn't be say saying you couldn't be say saying they couldn't be say saying
Perfect
I couldn't have say sayed you couldn't have say sayed he couldn't have say sayed we couldn't have say sayed you couldn't have say sayed they couldn't have say sayed
V-ing perfect
I couldn't have been say saying you couldn't have been say saying he couldn't have been say saying we couldn't have been say saying you couldn't have been say saying they couldn't have been say saying
Interrogative form
Simple form
could I say say? could you say say? could he say say? could we say say? could you say say? could they say say?
V-ing form
could I be say saying? could you be say saying? could he be say saying? could we be say saying? could you be say saying? could they be say saying?
Perfect
could I have say sayed? could you have say sayed? could he have say sayed? could we have say sayed? could you have say sayed? could they have say sayed?
V-ing perfect
could I have been say saying? could you have been say saying? could he have been say saying? could we have been say saying? could you have been say saying? could they have been say saying?
Interro-negative form
Simple form
couldn't I say say? couldn't you say say? couldn't he say say? couldn't we say say? couldn't you say say? couldn't they say say?
V-ing form
couldn't I be say saying? couldn't you be say saying? couldn't he be say saying? couldn't we be say saying? couldn't you be say saying? couldn't they be say saying?
Perfect
couldn't I have say sayed? couldn't you have say sayed? couldn't he have say sayed? couldn't we have say sayed? couldn't you have say sayed? couldn't they have say sayed?
V-ing perfect
couldn't I have been say saying? couldn't you have been say saying? couldn't he have been say saying? couldn't we have been say saying? couldn't you have been say saying? couldn't they have been say saying?