GrammarJLPT N5
→ and so
And then / And so (Colloquial conjunction)
JLPT N5ConjunctionCasual spoken
んで is a casual spoken conjunction that connects two clauses to express a sequence of events ("and then") or a reason-result relationship ("and so"). It is a colloquial contraction of ので, which itself is a softer, more explanatory way of expressing cause or sequence compared to から. Because んで is a spoken contraction, it belongs firmly to casual register and should not appear in formal writing or polite speech. It attaches to the plain form of verbs and adjectives, or to nouns and な-adjectives via な. Learners should be careful not to confuse んで with the て-form of the explanatory んだ (のだ → のて is ungrammatical, but んで as a contraction of ので is perfectly natural). In everyday conversation, んで softens the causal link between clauses, making statements sound less assertive than から while maintaining a natural, relaxed tone.
Functions
#1 Expressing a reason or cause
Structure
Clause A (plain form) + んで + Clause B
電車が遅れたんで、遅刻しました。
Here んで connects the reason (the train was delayed) with the result (being late to arrive). This is the most common use of んで, functioning as a casual equivalent of ので. The speaker presents the first clause as a soft explanation for what happened in the second clause, rather than making a strong logical assertion the way から would. This kind of usage is extremely natural in everyday spoken Japanese when explaining circumstances.The train was late, and so I was late.
Structures
- Verb (plain form)
- Verb (plain form) + んで
- い-Adjective
- い-Adjective + んで
- な-Adjective
- な-Adjective + な + んで
- Noun
- Noun + な + んで
Common mistakes
The most frequent mistake learners make is using んで in formal writing or polite contexts where the full form ので should be used instead; んで is strictly casual spoken Japanese. Another common error is forgetting to insert な before んで when the preceding word is a noun or な-adjective — saying 「休みんで」 instead of the correct 「休みなんで」. Some learners also confuse んで with the interrogative なんで (meaning "why"), especially in sentences where a noun plus なんで appears, since the pronunciation can be identical but the meaning is entirely different depending on context. Finally, beginners sometimes mix up んで with から, not realizing that んで carries a softer, more explanatory tone and is less suitable for strong assertions or commands.
Related
のでからて (conjunction)それでもんでもので