Time and sequence

~うちに

while; before (it changes)

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How to form it

  • Verb (dictionary form / ている / ない-form) + うちに
  • い-adjective + うちに
  • な-adjective + なうちに
  • Noun + のうちに

Register: Neutral

Explanation

Says that you should do something while a certain state lasts, before it changes. A second use says that something changes by itself while an action goes on.

Often implies urgency: do it now, because the state will not last. With ない form it means 'before it happens'.

Examples

  1. 若いうちに、いろいろな経験をしておきたい。

    わかいうちに、いろいろなけいけんをしておきたい。

    I want to gain all sorts of experience while I'm young.

  2. 忘れないうちに、メモしておこう。

    わすれないうちに、メモしておこう。

    Let me note it down before I forget.

  3. 温かいうちに召し上がってください。

    あたたかいうちにめしあがってください。

    Please eat it while it is warm.

Compare with

  • ~た上で: た上で is a sequence of steps; うちに is a time window before a state ends.

Common mistakes

  • Using it for a lasting state with no change expected.