I could prove you could prove she could prove we could prove you could prove they could prove
Forma con V-ing
I could be proving you could be proving she could be proving we could be proving you could be proving they could be proving
Perfecto
I could have proven you could have proven she could have proven we could have proven you could have proven they could have proven
Perfecto con V-ing
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
Negación
Forma simple
I could not prove you could not prove she could not prove we could not prove you could not prove they could not prove
Forma con V-ing
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
Perfecto
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
Perfecto con V-ing
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
Forma interrogativa
Forma simple
could I prove? could you prove? could she prove? could we prove? could you prove? could they prove?
Forma con V-ing
could I be proving? could you be proving? could she be proving? could we be proving? could you be proving? could they be proving?
Perfecto
could I have proven? could you have proven? could she have proven? could we have proven? could you have proven? could they have proven?
Perfecto con V-ing
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?
Forma interro-negativa
Forma simple
could I not prove? could you not prove? could she not prove? could we not prove? could you not prove? could they not prove?
Forma con V-ing
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?
Perfecto
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?
Perfecto con V-ing
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?