〜てはいけない: Saying 'Must Not' (Prohibition in Japanese): Japanese Learning Resources

yattajlpt.com/grammar/n5/te-waikenai

Explains the N5 grammar pattern 〜てはいけない for expressing prohibition or 'must not.' Covers standard and casual forms, formal variants, and contrasts with related patterns like permission and obligation.

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Level: beginner · 0 clicks from the results · last checked 2026-09-24 · found by our crawler

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