English verb conjugation
COULD RE-PROVE

Regular verb: re-prove - re-proved - re-proved

Affirmation

Simple form	V-ing form
I could re-prove you could re-prove he could re-prove we could re-prove you could re-prove they could re-prove	I could be re-proving you could be re-proving he could be re-proving we could be re-proving you could be re-proving they could be re-proving
Perfect	V-ing perfect
I could have re-proved you could have re-proved he could have re-proved we could have re-proved you could have re-proved they could have re-proved	I could have been re-proving you could have been re-proving he could have been re-proving we could have been re-proving you could have been re-proving they could have been re-proving

Negation

Simple form	V-ing form
I couldn't re-prove you couldn't re-prove he couldn't re-prove we couldn't re-prove you couldn't re-prove they couldn't re-prove	I couldn't be re-proving you couldn't be re-proving he couldn't be re-proving we couldn't be re-proving you couldn't be re-proving they couldn't be re-proving
Perfect	V-ing perfect
I couldn't have re-proved you couldn't have re-proved he couldn't have re-proved we couldn't have re-proved you couldn't have re-proved they couldn't have re-proved	I couldn't have been re-proving you couldn't have been re-proving he couldn't have been re-proving we couldn't have been re-proving you couldn't have been re-proving they couldn't have been re-proving

Interrogative form

Simple form	V-ing form
could I re-prove? could you re-prove? could he re-prove? could we re-prove? could you re-prove? could they re-prove?	could I be re-proving? could you be re-proving? could he be re-proving? could we be re-proving? could you be re-proving? could they be re-proving?
Perfect	V-ing perfect
could I have re-proved? could you have re-proved? could he have re-proved? could we have re-proved? could you have re-proved? could they have re-proved?	could I have been re-proving? could you have been re-proving? could he have been re-proving? could we have been re-proving? could you have been re-proving? could they have been re-proving?

Interro-negative form

Simple form	V-ing form
couldn't I re-prove? couldn't you re-prove? couldn't he re-prove? couldn't we re-prove? couldn't you re-prove? couldn't they re-prove?	couldn't I be re-proving? couldn't you be re-proving? couldn't he be re-proving? couldn't we be re-proving? couldn't you be re-proving? couldn't they be re-proving?
Perfect	V-ing perfect
couldn't I have re-proved? couldn't you have re-proved? couldn't he have re-proved? couldn't we have re-proved? couldn't you have re-proved? couldn't they have re-proved?	couldn't I have been re-proving? couldn't you have been re-proving? couldn't he have been re-proving? couldn't we have been re-proving? couldn't you have been re-proving? couldn't they have been re-proving?