のだ

Meaning & usage

The explanation is that ~; The reason is that ~; The fact is that ~; It is that ~ | A sentence ending which indicates that the speaker is explaining or asking for an explanation about some information shared with the hearer, or is talking about something emotively, as if it were of common interest to the speaker and the hearer.

Example sentences 4

1. あなたと結婚したいんです。

   I want to marry you.

2. 何をしているん・のですか。

   What are you doing?

3. 僕は今日のパーティーに行けません。宿題が沢山あるんです。

   I can't go to today's party. I have a lot of homework.

4. 日本語を勉強しているん・のです。

   I'm studying Japanese.