Korean phrase
어떻게 알았어요? eo tteo ke a ra sseo yo
Meaning
How did you know?
When to use it
This asks how someone learned something. It is a polite everyday question that can show surprise or simple interest.
Example dialogue
그 사실을 어떻게 알았어요? keu sa si reul eo tteo ke a ra sseo yo
How did you know that?
친구가 말해줬어요. chin gu ga mal hae jwo sseo yo
A friend told me.