This grammar shows a strong reason for something. It explains why something is true or why you should do something.
Verb [plain form] + んだからPrimary
い-Adjective [plain form] + んだから
な-Adjective + なんだから
Noun + なんだから
This grammar shows a strong reason for something. It explains why something is true or why you should do something.
学生なんだから、もっと勉強しなさい。
You're a student, so you should study more.
何度も練習したんだから、きっとうまくいくよ。
You've practiced so many times, so I'm sure it will go well.
CasualPastAffirmativeMid SentenceEmphaticSports & Martial ArtsMusic & EntertainmentEmotions & Psychology
まだ誰も来ていないんだから、そんなに急がなくてもいいよ。
Nobody has arrived yet, so you don't have to rush so much.
ここは静かなんだから、大声で話さないで。
It's quiet in here, so don't talk loudly.
「早く行こうよ！」 「まだ早いんだから！」
"Let's go already!" "It's still early! (So we don't have to rush.)"
Adding 'ん' makes your reason sound more like an explanation. It softens your words a little. Without 'ん', your statement is more direct. But with this grammar, 'ん' is almost always there.
「〜から」 just gives a reason. 「〜(ん)だから」 gives a strong reason. It means "obviously because...". It is more about feelings. It is not like 「〜(だ)もん」. That is more for kids or women. 「〜(ん)だから」 is stronger. You use it to tell people what to do. Or to complain.
Watch out: Do not use "〜(ん)だから" when you talk to people like your boss. It sounds too strong. It can seem rude. Use "〜ので" or "〜から" instead. Make sure to use polite forms with them.
Use this when you want to give a strong reason. You can leave out the end of the sentence. This makes your reason sound very clear. It can also sound like a complaint.
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