English verb conjugation
COULD SAY

Irregular verb: say - said - said

Affirmation

Simple form	V-ing form
I could say you could say he could say we could say you could say they could say	I could be saying you could be saying he could be saying we could be saying you could be saying they could be saying
Perfect	V-ing perfect
I could have said you could have said he could have said we could have said you could have said they could have said	I could have been saying you could have been saying he could have been saying we could have been saying you could have been saying they could have been saying

Negation

Simple form	V-ing form
I couldn't say you couldn't say he couldn't say we couldn't say you couldn't say they couldn't say	I couldn't be saying you couldn't be saying he couldn't be saying we couldn't be saying you couldn't be saying they couldn't be saying
Perfect	V-ing perfect
I couldn't have said you couldn't have said he couldn't have said we couldn't have said you couldn't have said they couldn't have said	I couldn't have been saying you couldn't have been saying he couldn't have been saying we couldn't have been saying you couldn't have been saying they couldn't have been saying

Interrogative form

Simple form	V-ing form
could I say? could you say? could he say? could we say? could you say? could they say?	could I be saying? could you be saying? could he be saying? could we be saying? could you be saying? could they be saying?
Perfect	V-ing perfect
could I have said? could you have said? could he have said? could we have said? could you have said? could they have said?	could I have been saying? could you have been saying? could he have been saying? could we have been saying? could you have been saying? could they have been saying?

Interro-negative form

Simple form	V-ing form
couldn't I say? couldn't you say? couldn't he say? couldn't we say? couldn't you say? couldn't they say?	couldn't I be saying? couldn't you be saying? couldn't he be saying? couldn't we be saying? couldn't you be saying? couldn't they be saying?
Perfect	V-ing perfect
couldn't I have said? couldn't you have said? couldn't he have said? couldn't we have said? couldn't you have said? couldn't they have said?	couldn't I have been saying? couldn't you have been saying? couldn't he have been saying? couldn't we have been saying? couldn't you have been saying? couldn't they have been saying?