Meaning
Conversational んです and more written のです connect a statement to its context: ‘the thing is…’.
Formation
- Plain verb or i-adjective + んです: 行くんです, 痛いんです.
- Add な after a noun or na-adjective: 学生なんです, 静かなんです.
- Use 〜んですか in a question; the full form 〜のです works the same way.
When to use it
- Explaining circumstances
- Gives a reason or background that helps the listener understand a situation.
- Asking for an explanation
- The form 〜んですか asks about a reason, intention, or further details.
Examples
18 sentences-
どうして遅れたんですか
Why were you late?
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頭が痛いんです
The thing is, my head hurts.
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明日は仕事があるんです
The thing is, I have work tomorrow.
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日本語を勉強しているんです
The thing is, I am studying Japanese.
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この町は静かなんです
The thing is, this town is quiet.
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私は新しい学生なんです
The thing is, I am a new student.
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頭が痛いんですが近くに病院がありますか
I have a headache; is there a hospital nearby?
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使い方がわからないんですが教えてください
I do not know how to use this; could you show me?
10 more examples
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明日試験があるんです
The thing is, I have an exam tomorrow.
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バスが来なかったんです
The bus did not come, you see.
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この店のカレーが好きなんです
I really like the curry at this place, you see.
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財布を家に忘れたんです
I left my wallet at home, you see.
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今、日本語を習っているんです
I am learning Japanese at the moment, you see.
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今日は少し疲れているんです
I am a little tired today, you see.
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来月引っ越すんです
I am moving next month, you see.
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駅まで遠いんですか
Is the station far away, then?
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どうしてこの本を選んだんですか
Why did you choose this book?
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初めての旅行なのです
This is my first trip, you see.
Important notes
- The pattern has no single required translation; context or a phrase such as ‘the thing is’ often conveys its nuance.
- んです is the usual conversational form, while のです often sounds more written or formal.
Common mistakes
- Do not put だ before んです: use 学生なんです, not 学生だんです.
- Do not attach んです to a polite form: 行きますんです is incorrect; use plain 行くんです.
Check yourself
Pick the translation of each sentence. The wrong options translate similar patterns, so watch the grammar rather than the words.
Similar grammar
Hear it in podcasts
The pattern appears in these episodes. They open in the app with the transcript and translation.
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