が来るまで

until … comes

→ が
phrase Uncommon #13,902
until … comes Attach it to a person or thing that is expected to come; が marks that person or thing as the subject.
JA: 友達が来るまでここで待ちましょう。
EN: Let's wait here until our friend comes.

じゃあ、みんな、お迎えが来るまで、先生が絵本を読んであげるね。

Alright, everyone, I'll read you a picture book until your parents come to pick you up.

救助が来るまで私達は何時間も待った。

We waited for hours for help to arrive.

新しい机が来るまで社長の席使って

Use the CEO’s desk until the new one arrives.

— Departures (2008)

医者が来るまで彼は激しい苦痛で横になっていた。

He lay in severe pain until the doctor arrived.

迎えが来るまででいいのね?

So you just need to wait until your ride gets here, right?

— Cosmic Princess Kaguya! (2026)

トムが来るまで僕は行けないんだよ。

I can't leave until Tom gets here.

弁護士が来るまで話さない。

I’m not saying anything until my lawyer gets here.