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This grammar pattern is used to indicate an indefinite reason to explain the following situation.
● 비가 와서 그런지 학교에 가기 싫어요. (I don’t want to go to school maybe because it’s rainy.)
● 한국 사람이어서 그런지 매운 음식을 좋아해요. (I like spicy food maybe because I’m Korean.)