-고서야

졸업을 하고서야 일자리를 구했어요.

Only after graduating did I find a job.

설명을 듣고서야 이해했어요.

Only after hearing the explanation did I understand.

밤이 되고서야 일이 끝났어요.

Only when night came did the work end.

아이가 잠들고서야 쉴 수 있었어요.

Only after the child fell asleep could I rest.

병원에 가고서야 병을 알았어요.

Only after going to the hospital did I learn of the illness.