I have been to see him.
私は彼に会った。
I saw him.
彼に会ったことがあります。
Did you ever meet him?
I ran into him.
おととい彼に会ったんだ。
彼に会ったのは私だ。
久しぶりで彼に会った
I came across him in a most unlikely place.
通りで彼に会った
I struck up an acquaintance with him.
I became acquainted with him.
I have already seen him [have seen him already].
運よく彼に会った.
Do you see anything of him?
I meet him occasionally.