～んです

〜n desu

Formation

Verb-casual + んです, い-Adjective + んです, な-Adjective + なんです, Noun + なんです

Provide an explanation or reason; 'it is that', 'the thing is', 'the reason is'.

When to use

Casual, spoken contraction of のです - the everyday explanatory tone.

Explanation

The ～んです grammar point is used to provide an explanation or reason for a situation or action. It can be translated as 'it is that', 'the thing is', or 'the reason is' in English. The formation differs depending on whether it is used with a verb, い-adjective, な-adjective, or noun.

Example sentences

遅おくれたんですが、電車でんしゃが遅おくれました。

I was late because the train was delayed.

Okuretan desuga, densha ga okuremashita.
疲つかれたんです。

I'm tired (that's why).

Tsukareta n desu.
彼かれは優やさしいんです。

The thing is, he is kind.

Kare wa yasashii n desu.
宿題しゅくだいが多おおいんです。

The reason is I have a lot of homework.

Shukudai ga ooi n desu.

Other forms

～のですBase formN4