彼と知り合いになった

became acquainted with him

→ 彼
phrase Rare #34,182
became acquainted with him Often means that you met someone and got to know them.
JA: 私は友達を通して彼と知り合いになった。
EN: I became acquainted with him through a friend.

私は去年彼と知り合いになった。

I got to know him last year.

私は昨夜彼と知り合いになった。

I met him for the first time last night.

そのとき以来彼と知り合いになった。

I have known him since then.

彼と知り合いになった。

I got to know him.

私はリーさんを通して彼と知り合いになった。

I got to know him through Mr. Lee.