A : I failed the test yesterday.
     - 어제 시험 망쳤어.

B : Don' be sad. You'll be better next time.
     - 너무 슬퍼하지마. 다음엔 잘 될거야.
 
A : I should have studied harder. 
     - 내가 공부를 좀 열심히 했어야했는데.

B : Don't take it seriously. Take it easy.
     - 심각하게 생각하지마. 편하게 해.