Can you prove that you weren't there?
They proved his innocence.
That theory was never proven.
He's always trying to prove something.
It was real[l]y stressful because I wanted to prove that the level of my English is high enough for this class but I was too nervous to speak cor[r]ectly. (Preliminary English Test; B1; Polish)
The operation proved a complete success.
The new treatment has proved to be very effective.
John proved to be a good friend and I really thank him for what he did for me. (First Certificate in English; B2; Greek)
I wish he'd stop trying to prove himself all the time.
Two weeks ago his coach had told him: "Morisson, you're going to play No.9 on Saturday against United, and it's going to be your last chance to prove yourself." (Certificate of Proficiency in English; C2; Greek)
