~のです、んです
undesu
You see; the explanation is that
Formation 接続
Plain verb / い-adjective + のです / んです; N / な-adjective + なのです / なんです
Explanation 説明
Adds an explanation connected to a situation already understood or observed. Questions with のですか or んですか ask for an explanation rather than a bare fact.
Examples 例文
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これから子供を保育園に迎えに 行かなければならないんです 。お先に失礼します。
I have to go and pick up my child from nursery now. Excuse me for leaving first.
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すいません。渋滞してたんで遅刻してしまいました。
Sorry, I was late because there was a traffic jam.
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満員電車は嫌いですが、会社に行くためには毎日乗らないといけないのです。
I dislike crowded trains, but I have to take one every day to get to work.
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明日行くんです。
I am going tomorrow, you see.
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あなたは全く分かっていないんですね。
You really do not understand at all, do you?
How related patterns differ 比較
ために can express purpose or cause. から and ので give reasons, while のです explains background. もの can offer an explanation, ものか strongly rejects, and ものなら hypothesizes a condition. Sharing もの does not make these patterns equivalent.
| Pattern | Meaning | Example |
|---|---|---|
| ~のです、んです | You see; the explanation is that | これから子供を保育園に迎えに 行かなければならないんです 。お先に失礼します。 I have to go and pick up my child from nursery now. Excuse me for leaving first. |
| ~もの | Because; after all; an explanatory reason | 今日は出かけたくない。疲れているんだもの。 I do not want to go out today. I am tired, after all. |
| ~ものか | No way; I certainly will not | そんなうそを信じるものか。 There is no way I will believe that lie. |
| ~ものなら | If it were possible; if one were to dare | できるものなら、もう一度学生時代に戻りたい。 If it were possible, I would like to return to my student days. |
| ~ために | In order to; for the sake of; because of | 日本に留学するために、お金を貯めています。 I am saving money to study in Japan. |
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