Grammar
-(으)면서
Meaning
Intermediate-(eu)myeonseo
Attaches to a verb or adjective stem to show that the same subject does or experiences two things at the same time ('while ~ing'). It can also carry a contrastive nuance, similar to 'even though', when the two clauses describe things that don't fit together.
Form
Vowel- or ㄹ-ending stem + -면서; consonant-ending stem + -으면서 (e.g. 가다 → 가면서, 먹다 → 먹으면서, 살다 → 살면서). Can also attach to a noun as N(이)면서 ('while being N'). Both clauses normally share the same subject. For the contrastive 'even though' sense, a past-tense marker can attach before it (알았으면서 'even though [he] knew').
Examples
아이가 노래를 부르면서 춤을 춥니다.
The child dances while singing.
다누리는 달 주위를 돌면서 사진을 찍습니다.
Danuri takes photos while orbiting the Moon.
돈이 없으면서 비싼 차를 샀어요.
Even though he had no money, he bought an expensive car.
그는 학생이면서 회사원입니다.
He is both a student and an office worker.
Common mistakes & nuance
Both clauses normally share the same subject; when the subjects differ, a different connector is usually the natural choice. The contrastive 'even though' sense is often reinforced by adding 도 (-면서도), which makes the mismatch clearer.
Similar grammar
- -(으)며
-(으)며 is the more formal, written equivalent of -(으)면서 for connecting simultaneous actions or parallel states. In everyday speech -(으)면서 is far more common, and only -(으)면서 carries the strong contrastive 'even though' nuance.
- -는데
-는데 sets up background information or a mild contrast and doesn't require the same subject or exact simultaneity in both clauses, while -(으)면서 specifically means two actions happen at the same time and normally requires the same subject.