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We've already learnt から to mean because or since. We're now going to learn another way of giving reasons with ので.

ので and から are very similar, but ので sounds slightly more formal.

The reason always goes before ので, and the only difference between this and から is how nouns and な-adjectives are used with it:

ので	から
元げん気きなので	元げん気きだから
犬いぬなので	犬いぬだから

Question	Answer
because, since	ので node
cold^weather	寒さむい samui
window	窓まど mado
It's cold, so please shut the window.	寒さむいのでまどをしめてください。 samui node mado wo simete kudasai.
It was raining so I bought an umbrella.	雨あめだったので傘かさを買かいました。 ame datta node kasa wo kaimasita.
They're really good because they play soccer everyday.	毎まい日にちサッカーをするのでとても上じょう手ずです。 mainiti sakkaa wo suru node totemo zyouzu desu.
cake	ケーキ keeki
I love banana, so I want to eat the banana cake.	バナナが好すきなので、バナナのケーキが食たべたいですね。 banana ga sukina node, banana no keeki ga tabetai desu ne.
Mr. Yamada does karaoke every day, because he loves music.	山やま田ださんは音おん楽がくが大だい好すきなので、毎まい日にちカラオケをします。 yamada san ha ongaku ga daisukina node, mainiti karaoke wo simasu.
He's clever, so he's good at studying.	頭あたまがいいので勉べん強きょうするのが上じょう手ずだ。 atama ga ii node benkyousuruno ga zyouzu da.

Practice this lesson

Learn Japanese Lesson 236: Explain why using ので