spontaneous body reaction with 出る
grammar1 sentence
The intransitive 出る ('come out, emerge') is the standard verb for spontaneous bodily reactions in Japanese — yawns, tears, fevers, sighs. あくびが出る, 涙が出る, 熱が出る, ためいきが出る. The body part or reaction takes が, framing the event as something arising from within.
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