～うちに — While the chance lasts; in the process | JLPT N3 grammar

Meaning

Use it to act before a state changes or to describe a gradual change arising during a process. Do not use it for a plain scheduled interval with two parallel actions; ～間 is normally better there.

Formation

Vる／Vている／Vない＋うちに
い-adjective＋うちに・な-adjective＋なうちに・N＋のうちに

When to use it

Where to use it: It fits a disappearing opportunity ('while it is warm', 'before it gets dark') and an unintentional change that develops while A continues.
Where not to use it: Do not use it for a precise event inside a fixed period or for two actions lasting throughout that period; distinguish ～間／～間に.

Examples

20 sentences

元気げんきなうちに、家族かぞくと長いながい旅たびをしたい。
While I am healthy, I want to take a long trip with my family.
温かいあたたかいうちに、このスープを飲んでのんでください。
Please drink this soup while it is warm.
雨あめが降らないふらないうちに、駅えきまで歩こうあるこう。
Let us walk to the station before it starts raining.
古いふるい写真しゃしんを整理せいりしているうちに、子どもこどもの頃ころのことを思い出したおもいだした。
While sorting through old photographs, I remembered my childhood.
何度なんども練習れんしゅうするうちに、自然しぜんに話せるはなせるようになった。
As I practiced again and again, I gradually learned to speak naturally.
日本語にほんごを勉強べんきょうしているうちに、日本にほんの文化ぶんかにも興味きょうみを持つもつようになった。
While studying Japanese, I gradually became interested in Japanese culture as well.
猫ねこが眠っねむっているうちに、爪つめを切っきってしまおう。
While the cat is asleep, let's trim its claws.
桜さくらが散らちらないうちに、川辺かわべで家族写真かぞくしゃしんを撮っとった。
Before the cherry blossoms fell, we took a family photo by the river.

12 more examples

祖母そぼの話はなしを聞いきいているうちに、昔むかしの町まちが目めの前まえに浮かんうかんできた。
As I listened to my grandmother, the old town seemed to appear before my eyes.
地図ちずを眺めながめているうちに、名前なまえも知らしらない島しまへ行きいきたくなった。
While looking at the map, I began to want to visit an island whose name I did not even know.
スープが温かいあたたかいうちに飲んでのんでください
Please have the soup while it is warm.
暗くくらくならないうちに帰りかえりましょう
Let's go home before it gets dark.
元気げんきなうちにいろいろな所ところへ行きいきたいです
While I am healthy, I want to visit many places.
学生がくせいのうちに留学りゅうがくしたいです
I want to study abroad while I am still a student.
忘れわすれないうちにメモしておきます
I will make a note before I forget.
日本語にほんごを聞いきいているうちに少しすこし分かるわかるようになりました
As I kept listening to Japanese, I began to understand a little.
何度なんども読むよむうちに好きすきになりました
As I read it again and again, I gradually grew to like it.
話しはなしているうちに不安ふあんがなくなりました
My anxiety disappeared as we talked.
店みせが空いすいているうちに買い物かいものを済ませすませます
I will finish shopping while the shop is quiet.
雨あめが降らふらないうちに洗濯物せんたくものを入れいれてください
Please bring in the laundry before it rains.

Important notes

With an intentional B it often means 'do it in time'; with an unintentional B it marks gradual change.

Common mistakes

Do not place an instantaneous state before うちに unless it can meaningfully continue.
Do not confuse Vないうちに 'before it happens' with Vる前に, which merely states sequence.

Check yourself

Pick the translation of each sentence. The wrong options translate similar patterns, so watch the grammar rather than the words.

Sentence 1: 祖母そぼの話はなしを聞いきいているうちに、昔むかしの町まちが目めの前まえに浮かんうかんできた。 As I listened to my grandmother, the old town seemed to appear before my eyes.While I looked away for a moment, the cat licked my ice cream.Just as I was heading to the station, a friend called me.
Sentence 2: 忘れわすれないうちにメモしておきます While my father was cooking, I was clearing the table.I am just about to leave home.I will make a note before I forget.
Sentence 3: 雨あめが降らふらないうちに洗濯物せんたくものを入れいれてください We are checking this with the person in charge right now.Please bring in the laundry before it rains.The dog hid under the table the whole time the fireworks were going off.