N4Particles & Connectors

Plain form + んです (Na/N + なんです)

Q: Is "Using 'da' instead of 'na' for nouns and na-adjectives." correct?

No. The correct form is "Use 'na' instead of 'da' for nouns and na-adjectives.". This mistake can change the meaning of the sentence and make it sound less natural.

Q: Is "Overusing it in neutral factual statements where it sounds unnatural." correct?

No. The correct form is "Use it only when providing an explanation or seeking clarification.". Overusing this pattern can make the sentence sound less natural and less formal.

Q: Is "Confusing with the plain 'desu' form." correct?

No. The correct form is "Use the plain 'desu' form for neutral statements and this pattern for explanatory statements.". This mistake can change the meaning of the sentence and make it sound less natural.

explanation; emphasis

Definition

Meaning

The grammar pattern 'Plain form + んです (Na/N + なんです)' is used to provide an explanation, seek clarification, or add emphasis to a statement. It makes the sentence sound more personal or explanatory than a simple statement. This pattern is often used in informal conversations and can be translated to English as 'you know', 'I mean', or 'it's like this'.

Structure

Formation Rules

Form	Pattern	Example
Na-adjective	Na-adjective + なんです	頭が痛いなんです
Noun	Noun + なんです	今日は日曜日なんです
Verb	Verb + なんです	すみません、少し遅れなんです

Examples

Example Sentences

どうしたんですか。

doushitan desu ka

What's wrong?

どうしたんですか。 (doushitan desu ka) - What's wrong? (lit. What happened to you?)

今日は日曜日なんです。

kyou wa nichiyoubi nan desu

Today is Sunday.

今日は (kyou wa) - Today, 日曜日 (nichiyoubi) - Sunday, なんです (nan desu) - It's like this

すみません、少し遅れなんです。

sumimasen, sukoshi osoe nan desu

Sorry, I'm running a bit late.

すみません (sumimasen) - Sorry, 少し (sukoshi) - a bit, 遅れ (osoe) - late, なんです (nan desu) - It's like this

頭が痛いなんです。

atama ga itai nan desu

I have a headache.

頭が (atama ga) - my head, 痛い (itai) - hurts, なんです (nan desu) - It's like this

Context

Usage Notes

This pattern is used in informal conversations to provide an explanation or seek clarification. It's not suitable for formal writing or situations where a more neutral tone is required. It can be compared to the pattern 'Plain form + です (Na/N + です)', but the latter is more formal and less explanatory.

Watch out

Common Mistakes

Using 'da' instead of 'na' for nouns and na-adjectives.

Use 'na' instead of 'da' for nouns and na-adjectives.

This mistake can change the meaning of the sentence and make it sound less natural.

Overusing it in neutral factual statements where it sounds unnatural.

Use it only when providing an explanation or seeking clarification.

Overusing this pattern can make the sentence sound less natural and less formal.

Confusing with the plain 'desu' form.

Use the plain 'desu' form for neutral statements and this pattern for explanatory statements.

This mistake can change the meaning of the sentence and make it sound less natural.

Strategy

JLPT Exam Tips

In the JLPT exam, this pattern is often tested in the listening section. Pay attention to the context and the speaker's tone to determine whether to use this pattern or not.

In context