piltong ane bolpeni se gaena deureo isseo.

subject particle

Breakdown of piltong ane bolpeni se gaena deureo isseo.

• 개: general counter
• 셋: three
• 들어 있다: to be inside

Questions & Answers about piltong ane bolpeni se gaena deureo isseo.

Why does 안에 mean in the pencil case?

안 means inside, and 에 marks a location.

So:

• 필통 = pencil case
• 안 = inside
• 에 = at / in

Together, 필통 안에 means inside the pencil case or in the pencil case.

Korean often builds location phrases this way:

• 상자 안에 = in the box
• 가방 안에 = in the bag
• 주머니 안에 = in the pocket

Why is it 에 and not 에서?

Use 에 when something exists or is located somewhere.

In this sentence, the pens are simply in the pencil case, so 에 is correct.

• 필통 안에 볼펜이 있어. = There is a pen in the pencil case.

에서 is usually used for:

• the place where an action happens
• the starting point of movement in some cases

For example:

• 학교에서 공부해. = I study at school.
• 집에서 먹어. = I eat at home.

Since this sentence is about where something is, not where an action is happening, 에 is the natural choice.

Why is 볼펜이 marked with 이?