could prove
Verbe irrégulier : prove - proved- proven
Traduction française : prouver - s'avérer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could prove
you could prove
he could prove
we could prove
you could prove
they could prove 	I could be proving
you could be proving
he could be proving
we could be proving
you could be proving
they could be proving	I could have proven
you could have proven
he 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
he could have been proving
we could have been proving
you could have been proving
they could have been proving	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not prove
you could not prove
he 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
he could not be proving
we could not be proving
you could not be proving
they could not be proving	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	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	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I prove?
could you prove?
could he prove?
could we prove?
could you prove?
could they prove? 	could I be proving?
could you be proving?
could he be proving?
could we be proving?
could you be proving?
could they be proving? 	could I have proven?
could you have proven?
could he 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 he have been proving?
could we have been proving?
could you have been proving?
could they have been proving? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not prove?
could you not prove?
could he 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 he not be proving?
could we not be proving?
could you not be proving?
could they not be proving? 	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? 	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?