GRAMMAR DETAIL
〜うちに
Indicates completing an action within the limited time that the preceding state remains in effect.
Examples
明るいうちに、山を下りよう。
Let us descend the mountain while it is still light.
Words used
忘れないうちに、必要なことを書き留めておこう。
Let us write down what we need before we forget.
Words used
雨が降らないうちに洗濯物を取り込もう。
Let us bring in the laundry before it starts raining.
Words used
Study notes
1. Origins, structure, and basic meaning
- Structure:
うちにsets a limited opportunity while a state still holds and introduces an action to take before that state changes. - Basic usage:
明るいうちに、山を下りよう。proposes descending the mountain while there is still daylight.
2. Common pitfalls and similar expressions
- The time window created by a negative
忘れないうちに書くmeans writing while one still remembers, before forgetting. This reverses the time relation in忘れた後で書く, which places writing after forgetting.
- Connecting nouns and adjectives
- Nouns take
の, as in学生のうちに, and na-adjectives takeな, as in元気なうちに. I-adjectives connect unchanged, as in若いうちに.
- Nouns take

