대신해

In a sentence

• 친구 대신해 내가 도와줄게.

  I'll help you instead of my friend.

  Here, '대신해' is used to indicate replacement or substitution of one subject for another.

• 수업이 취소되어 영화 보는 걸로 대신해요.

  Since the class is canceled, let's watch a movie instead.

  In this case, '대신해요' is employed to mean replacing an activity with another.

• 돈을 대신해 시간을 투자했어요.

  Instead of spending money, I invested time.

  Here, '대신해' signifies an exchange or preference of one resource for another.