I could prove you could prove he could prove we could prove you could prove they could prove
Forma com V-ing
I could be proving you could be proving he could be proving we could be proving you could be proving they could be proving
Perfeito
I could have proven you could have proven he could have proven we could have proven you could have proven they could have proven
Perfeito com V-ing
I could have been proving you could have been proving he could have been proving we could have been proving you could have been proving they could have been proving
Negação
Forma simple
I could not prove you could not prove he could not prove we could not prove you could not prove they could not prove
Forma com V-ing
I could not be proving you could not be proving he could not be proving we could not be proving you could not be proving they could not be proving
Perfeito
I could not have proven you could not have proven he could not have proven we could not have proven you could not have proven they could not have proven
Perfeito com V-ing
I could not have been proving you could not have been proving he could not have been proving we could not have been proving you could not have been proving they could not have been proving
Forma interrogativa
Forma simple
could I prove? could you prove? could he prove? could we prove? could you prove? could they prove?
Forma com V-ing
could I be proving? could you be proving? could he be proving? could we be proving? could you be proving? could they be proving?
Perfeito
could I have proven? could you have proven? could he have proven? could we have proven? could you have proven? could they have proven?
Perfeito com V-ing
could I have been proving? could you have been proving? could he have been proving? could we have been proving? could you have been proving? could they have been proving?
Forma interro-Negação
Forma simple
could I not prove? could you not prove? could he not prove? could we not prove? could you not prove? could they not prove?
Forma com V-ing
could I not be proving? could you not be proving? could he not be proving? could we not be proving? could you not be proving? could they not be proving?
Perfeito
could I not have proven? could you not have proven? could he not have proven? could we not have proven? could you not have proven? could they not have proven?
Perfeito com V-ing
could I not have been proving? could you not have been proving? could he not have been proving? could we not have been proving? could you not have been proving? could they not have been proving?