なり（断定）

なり is the cornerstone of classical literary style. While modern Japanese uses だ or です, classical texts rely on なり for assertion（断定）and existence（存在）.

1. Attachment Rules:

• Assertion（断定）: Follows nouns（体言）or the Attributive Form（連体形）of verbs/adjectives. Example: 春なり（はるなり）- 'It is spring.'
• Hearsay Distinction: It is crucial to distinguish this from the hearsay/estimation auxiliary なり. First, they conjugate differently: while the copula follows the 形容動詞型 (Adjectival Noun type), hearsay/estimation follows the ラ変型 (Ra-hen type) pattern: 〇 / なり / なり / なる / なれ / 〇. Second, the translation of hearsay/estimation splits based on context: Hearsay（伝聞） is translated as 'I hear that...' or 'It is said that...' (used for rumors, letters, or people talking), while Estimation（推定） is translated as 'It sounds like...' (used when explicitly mentioning a physical sound, derived from 音あり（ねあり）- 'a sound exists'). Finally, their attachment rules differ. The copula attaches to the Attributive Form（連体形）. While hearsay generally attaches to the Terminal Form（終止形）, there is a major exception: for ラ変（らへん）verbs (such as あり, おり, 侍り, いまそかり), hearsay なり also attaches to the Attributive Form（連体形）, making the two forms identical in appearance for these specific verbs. However, for adjectives（形容詞）, they are easily distinguishable: Copula なり attaches to the regular attributive form (本活用 連体形, e.g., 高きなり), whereas Hearsay なり attaches to the auxiliary attributive form (カリ活用 連体形, e.g., 高かるなり).
• Nasal Sound Change（撥音便）and Unwritten Nasals（無表記）: When Hearsay なり attaches to the syllable る of ラ変 verbs or カリ adjectives, it undergoes a nasal sound change to 〜んなり, which is frequently unwritten as 〜あなり or 〜かなり. Crucially, Copula なり NEVER triggers a nasal sound change. Therefore, any nasal change or unwritten nasal (like あんなり or あなり) is 100% Hearsay/Estimation. In contrast, a form like あるなり requires context to distinguish between the two.

2. Existence（存在）:
なり can also indicate location, meaning 'to be in' or 'to exist at.' In this case, it usually follows a noun indicating a place. This usage is almost exclusively found in the Attributive Form（なる）, and is extremely rare in the Terminal Form（なり）. Example: 春日なる（かすがなる）- 'Which is in Kasuga.'

3. Conjugation (形容動詞型 / ナリ活用):
なり follows the 形容動詞型 (Adjectival Noun type) conjugation pattern:

• 未然形（みぜんけい）: なら — Used for conditionals（ならば）.
• 連用形（れんようけい）: なり / に — The form にて (the 連用形 に plus the conjunctive particle て) is the ancestor of the modern particle/copula で.
• 終止形（しゅうしけい）: なり — Ends the sentence.
• 連体形（れんたいけい）: なる — Modifies nouns. This is the origin of the な in modern な-adjectives.
• 已然形（いぜんけい）: なれ — Used with particles like ば or for emphasis with こそ.
• 命令形（めいれいけい）: なれ — 'Be [something]!'

4. Distinguishing 'に' (にの識別):
Because the 連用形 of Copula なり is 'に', distinguishing it from the case particle 'に' and the perfective auxiliary 'ぬ' is a highly tested and crucial concept for classical Japanese learners. A helpful rule is that when 'に' is followed by particles like や, か, or こそ (e.g., にや, にか, にこそ), it is almost always the 連用形 of the Copula なり. Additionally, when you see the pattern [Noun] + に + [あり/おはす/etc.], the 'に' is almost always the copula なり (meaning 'is'), not the location particle. A core translation tip: If you can translate 'に' as 'で' or 'であって' (is/being), it is the copula. If it translates as 'に' (at/in/on), it is the case particle.

5. Identification of なり (なりの識別):
It is essential to distinguish the copula なり from other identical-looking forms:

• Adjectival Nouns (形容動詞の活用語尾): If the part before なり cannot stand alone as an independent noun (e.g., 静かなり, 堂々となり), then なり is just the conjugation suffix of an adjectival noun, not the independent copula.
• The Verb 'To Become' (動詞「なる」の連用形/終止形): The verb なる (to become) can appear as なり. This usually follows the pattern [Noun] + に + なり (becomes [Noun]) or [Adjective] + く + なり (becomes [Adjective]).