annaebangsongeul deutgo naseoya seunggangjangi bakkwin geol arasseoyo.

subject particle

Breakdown of annaebangsongeul deutgo naseoya seunggangjangi bakkwin geol arasseoyo.

• ~을: object particle
• 듣다: to hear
• 것: thing

Questions & Answers about annaebangsongeul deutgo naseoya seunggangjangi bakkwin geol arasseoyo.

How do I break this sentence down grammatically?

A natural breakdown is:

• 안내방송을 = the announcement
  • object marker 을
• 듣고 나서야 = after listening
  • only then / not until then
• 승강장이 바뀐 걸 = that the platform had changed
• 알았어요 = I realized / I found out

So the structure is basically:

[After hearing the announcement, only then] [I realized] [that the platform had changed].

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What does -고 나서야 mean here?

-고 나서야 means more than just after doing something.

• -고 나서 = after doing
• -고 나서야 = only after doing, not until doing that

So:

• 안내방송을 듣고 나서 알았어요 = I found out after hearing the announcement
• 안내방송을 듣고 나서야 알았어요 = I only found out after hearing the announcement

The 야 adds a feeling of lateness or emphasis, like only then.

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Why is it 듣고 나서야, not 들어서야?