内に
While, During
Structure
［い］Adjective + うちに
［な］Adjective + な + うちに
Noun + の + うちに
Explanation
The word うち, which can be written with the kanji 内 or 裡, combines with the case marking particle に to describe a window of time or a certain condition. Within this window, another action or change takes place. Frequently, this implies that it is the 'ideal' or 'best' time for that second event to happen. Common English translations for うちに include 'while' or 'before'.
うちに attaches to the dictionary form or ている form of a verb. It can also follow い-Adjectives in their plain form, nouns which are connected with の, and な-Adjectives which are followed by な.
- 日本に住むうちに、だんだんと地震に慣れてくる。As you live in Japan, you gradually get used to earthquakes.
- 暖かいうちに公園を散歩しよう。Let's take a walk in the park while it's warm.
- 通りがまだ静かなうちに、店に行きましょう。Let's go to the store while the street is still quiet.
- 学生のうちに、できるだけたくさん勉強しておきなさい。You should study as much as you can while you're a student.
In contrast to 間に, うちに indicates that an event takes place at some unspecified point 'during' a period or state (A). It does not specify exactly when the second event (B) happens within that timeframe.
- 映画を見ている間に寝てしまったので、話の最後が分からない。I fell asleep while watching the movie, so I don't know how it ends. (During the entire process of watching)
- 映画を見ているうちに寝てしまったので、話の最後が分からない。I fell asleep while watching the movie, so I don't know how it ends. (At some point while watching)
Fun Fact
The kanji 裡 literally means the inside lining of an object, or the space contained within. This visual can help you remember the 'non-specific' nature of うち, as it refers to something happening anywhere within that enclosed period of time.
Examples
子供が寝ている内に洗濯をしよう。
Let's do the laundry while the kids are asleep.
ラーメンは温かい内に食べてください。
Please eat the ramen while it's warm.
忘れない内に、メモしておこう。
I should write a note before I forget.
何度も練習している内に、上手にできるようになりました。
I got good at it as I kept practicing over and over.
お母さんが元気な内に、一緒に旅行したい。
I want to travel with my mother while she is still healthy.
雨が降らない内に、買い物に行きましょう。
Let's go shopping before it starts to rain.
話している内に、彼の考えが分かってきた。
I began to understand his way of thinking while we were talking.
今日の内にこのレポートを終わらせなければなりません。
I have to finish this report sometime today.
知らない内に、外はすっかり暗くなっていた。
Before I knew it, it had gotten completely dark outside.
桜がきれいな内に、お花見に行きたいね。
I'd love to go see the cherry blossoms while they're still beautiful.
この曲は聞いている内に好きになった。
I grew to like this song as I listened to it.
学生の内に、もっと勉強しておけばよかった。
I should have studied more while I was a student.