Time and sequence
~うちに
while; before (it changes)
AI-written, reviewed by AI (ChatGPT)
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
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.
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.
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.