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A2 · Elementary Grammar

아서 / 어서

Because / So (cause → result)
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Connects two clauses where the first is the reason for the second. Cannot be used with commands or suggestions.

Tip: Cannot change tense on the 아서/어서 clause — only the final verb gets tense.

Examples

KoreanEnglish
배가 고파서 먹었어요. I was hungry so I ate.
늦어서 미안해요. I'm sorry because I'm late.
피곤해서 일찍 잤어요. I was tired so I slept early.