English verb conjugation
COULD PROVE

Irregular verb: prove - proved - proven

Affirmation

Simple form	V-ing form
I could prove you could prove she could prove we could prove you could prove they could prove	I could be proving you could be proving she could be proving we could be proving you could be proving they could be proving
Perfect	V-ing perfect
I could have proven you could have proven she could have proven we could have proven you could have proven they could have proven	I could have been proving you could have been proving she could have been proving we could have been proving you could have been proving they could have been proving

Negation

Simple form	V-ing form
I could not prove you could not prove she could not prove we could not prove you could not prove they could not prove	I could not be proving you could not be proving she could not be proving we could not be proving you could not be proving they could not be proving
Perfect	V-ing perfect
I could not have proven you could not have proven she could not have proven we could not have proven you could not have proven they could not have proven	I could not have been proving you could not have been proving she could not have been proving we could not have been proving you could not have been proving they could not have been proving

Interrogative form

Simple form	V-ing form
could I prove? could you prove? could she prove? could we prove? could you prove? could they prove?	could I be proving? could you be proving? could she be proving? could we be proving? could you be proving? could they be proving?
Perfect	V-ing perfect
could I have proven? could you have proven? could she have proven? could we have proven? could you have proven? could they have proven?	could I have been proving? could you have been proving? could she have been proving? could we have been proving? could you have been proving? could they have been proving?

Interro-negative form

Simple form	V-ing form
could I not prove? could you not prove? could she not prove? could we not prove? could you not prove? could they not prove?	could I not be proving? could you not be proving? could she not be proving? could we not be proving? could you not be proving? could they not be proving?
Perfect	V-ing perfect
could I not have proven? could you not have proven? could she not have proven? could we not have proven? could you not have proven? could they not have proven?	could I not have been proving? could you not have been proving? could she not have been proving? could we not have been proving? could you not have been proving? could they not have been proving?