deogun
I noticed that
Used to report something you personally observed and found notable.
Rule: This is 반말 and sounds slightly bookish. In everyday speech -더라 is more natural, and -더군요 is the polite form. You cannot use it about your own feelings or actions.
생각보다 넓더군요.
It was bigger than I expected.
한국 음식이 맵더군요.
Korean food was spicy, I found.
사람이 정말 많더군요.
There really were a lot of people.
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