Jisho

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Auxiliary
1. (usu. used after -masu stem of verb) emphatic negative (verb)Colloquialism, や is from は and しない is negative of する
  • わたし私の
  • 飲んだ
  • スープ
  • あつ熱くて
  • 飲め
  • やしなかった
  • The soup I had was so hot I couldn't drink it.

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