いつ何なん時どき

adverb

at any time; at any moment

Emphasizes that something could happen at any moment, often with a sense of urgency or unpredictability. Used in warnings or when describing a situation that may change suddenly.

• 地じ震しんはいつ何なん時どき起おこるかわからない。

  An earthquake could happen at any time.

• 彼かれはいつ何なん時どき倒たおれてもおかしくない状じょう態たいだ。

  He is in a condition where he could collapse at any moment.

adverb

when; at what moment

More emphatic than いつ alone; often used in rhetorical questions or to express impatience, demanding a specific time. Can sound pressing or dramatic.

• いつ何なん時どきになったら準じゅん備びができるんだ？

  When on earth will you be ready?

• いつ何なん時どきまで待まてばいいのか教おしえてくれ。

  Tell me until when exactly I should wait.