Posted inN1 【JLPT N1 Grammar】~でなくてなんだろう – It Must Be… / Nothing But… 📘 ~でなくてなんだろう is an advanced JLPT N1 grammar pattern used to strongly assert that something can only be described a certain way. It translates to "it must be..." or "nothing… Posted by thuandao Tags: ~でなくてなんだろう, Japanese, Japanese Grammar N1, JLPT, N1, N1 Grammar2025年5月3日