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と知り合って

get acquainted with

→ と
phrase Uncommon #8,746
get acquainted with The と marks the person you become acquainted with. The て-form connects this phrase to what follows; the base form と知り合う means “to become acquainted with” or “to meet and get to know.”
JA: 大学で彼と知り合って、今でもよく連絡を取っています。
EN: I got acquainted with him at university, and we still keep in touch.

でも数年前に母はある男と知り合って…彼の言うままにこのモーテルを建てたんだ

But a few years ago, my mother met a man... and built this motel just as he told her to.

— サイコ (1960)

ルチアニと知り合ってどれくらいだ？

How long have you known Luciani?

— 預言者 (2009)

彼女と知り合ってからどれくらいになりますか。

How long have you known her?

ジャックと知り合ってどのくらいになりますか。

How long have you known Jack?

あなたはジュディさんと知り合ってどれぐらいになりますか。

How long have you known Judy?