-는가 하면

While... also..., Not only... but also..., On one hand... on the other

Explanation

This expression is used when the contents of the preceding and following clauses are either contrary to each other or simply different.

Details

1. This expression can be used to indicate an additional fact in the following clause about the content stated in the preceding clause.

그 기업은 사업 분야를 넓히는가 하면 해외 전문가들을 영입하는 데에도 적극 나서고 있다.
Not only is that company working to broaden its field of business but it’s also actively scouting out foreign professionals.
김민혁 선수는 이번 올림픽에서 신기록을 세웠는가 하면 기자들이 선정한 올해의 선수로도 뽑혀 최고의 해를 보내고 있다.
Not only did the athlete Kim Minhyeok achieve a new record at the most recent Olympics, but he was also chosen by reporters as the athlete of the year, so he’s having the best year of his life.

2. When expressing a situation in the past, the past tense marker '-았/었-' is optional. That is, the form -는가 하면 is also acceptable.

김 씨는 빼돌린 공금으로 명품을 구입했는가 하면 펀드에 투자했다가 손해를 봤다고 조사됐다.
=김 씨는 빼돌린 공금으로 명품을 구입하는가 하면 펀드에 투자했다가 손해를 봤다고 조사됐다.

빼돌리다: to pocket, to siphon (money)
공금: public funds
펀드: fund