Practice JLPTHow to tell them apart
ながら attaches to a verb stem and means two actions happen at the exact same time, performed by the same person (食べながら話す). 間に marks a span of time during which another event occurs, often by someone else, and the two actions don't have to be simultaneous moment-by-moment. Swapping them is unnatural when you describe one ongoing state or period rather than two concurrent actions.
- ながら Use ながら when one person does two actions at the same time.
- 間・あいだ(に) Use 間に when an event happens within a span of time.
| Grammar point | Meaning | JLPT level |
|---|---|---|
| ながら nagara | While | N4 |
| 間・あいだ(に) aida ni | During/While | N5 |
ながら nagara
While
While; over; with | A conjunction which indicates that the action expressed by the preceding verb takes place concurrently or simultaneously with the action expressed in the main clause.
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ものを食べながら話してはいけません。
Don’t talk with food in your mouth. / You must not talk while eating things.
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山口さんは笑いながら私の話を聞いていた。
Mr. Yamaguchi was listening to me with a smile. / While smiling, Mr. Yamaguchi was listening to my story.
間・あいだ(に) aida ni
During/While
During (the time when); while | The space between two temporal or physical points.
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スミスさんは日本にいる間英語を教えていました。
Mr. Smith was teaching English (all during the time) while he was in Japan.
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中川さんのお母さんは中川さんがパリに留学している間に病気になりました。
Mr. Nakagawa's mother become ill while he was studying in Paris.
ながら and 間・あいだ(に) are JLPT N5–N4 grammar points that Japanese learners often mix up. This page compares them side by side — meanings, usage and example sentences — so you can tell them apart.