How to say, "Until someone did something" in Korean?
For example,
I wasn't happy until I met you.
I was feeling sick, until I ate.
And so on.
My guess is to make the verb a noun and add 까지, or is another grammar point?
Thanks~

Question

Answer

"A did B until C did D" say  "C가 D할때까지 A는 B했다." in Korean.
The past tense of D is omitted in this case.

If you want to express the past tense of D, say
"C가 D했을 때 비로소 A는 B하지 않았다."

I wasn't happy until I met you.
너를 만날 때까지 나는 행복하지 않았다.
너를 만났을 때 비로소 나는 행복했다.

Answer

(ㄹ/을) 때까지 — until

누군가 무언가 할 때까지 — until someone did something
저는 너를 만날 때까지 안 기뻤어요. — I wasn't happy until I met you.

As you can see, the past tense is expressed with only last verb.

I am still a beginner in Korean though, so I might be wrong. Though this is what I learnt using Daum.

لا تفوّت فرصة تعلّم لغة جديدة وأنت مرتاح في منزلك. تصفّح مجموعتنا المختارة من مدرّسي اللغات ذوي الخبرة وسجّل في درسك الأول الآن!