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〜と (conditional): whenever; if (natural result)
More · Mood & voice
A leads automatically to B: whenever A, B.
Plain dictionary form + と. Expresses natural results, habits, discoveries. B cannot be a request, order or intention. Not the quoting と.
Examples
春になると、花が咲く。
When spring comes, flowers bloom.
ボタンを押すと、ドアが開く。
When you press the button, the door opens.