Question

우리는 숲을 산책했어요 -에서 can be used to mark the location where an action takes place. When -에서 used in such function is replaced by -을/를 the meaning of the clause changes. While -에서 marks the place where the action was performed, -을/를 signals that the action was performed across the mentioned space from start to finish.

Accepted Answer

We took a walk through the woods

Front	우리는 숲을 산책했어요
Back	We took a walk through the woods
Notes	-에서 can be used to mark the location where an action takes place. When -에서 used in such function is replaced by -을/를 the meaning of the clause changes. While -에서 marks the place where the action was performed, -을/를 signals that the action was performed across the mentioned space from start to finish.

에서 Action 을/를 우리는 숲을 산책했어요 Walk Woods