[일빵빵78] Why do you

Why do you 왜 ~ 해?
Why do you look so depressed? 왜 그렇게 침울해보여?
Why do you look so tired?
Why do you feel like that? 왜 그렇게 느끼세요?
Why do you think it is important?

I think S V 처럼 강조하기 위해서 think를 붙이는 것처럼
Why (do you think) this is interest?
Why this is interest?라고 해도 의미는 같다

Why do you keep looking at your watch?
왜 시계만 바라보고 있나요?