Dictionary / Vocabulary / ない内に
ないうちに
before it becomes (verb); before (an undesirable thing occurs)
Also written 無い内に
彼は雇われて2ヶ月もしない内に首になった。
He had not been employed two months before he was fired.
あまり長く待たない内に彼がきた。
I had not waited long before he came.
あまり遠くに行かない内ににわか雨にあった。
We had not gone far before we were caught in a shower.