必要
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Base na-adjective form. Used with 『な』 (na) before nouns, e.g., 『必要なもの』 (hitsuyō na mono, 'necessary thing').
Theme
In a study group, User and their friend Aiko are discussing what materials are needed for an upcoming exam.
必要
ひつよう
necessary
Core Language Building BlocksCore Adjectives
Memory Hook
Think of something 'necessary' like a 'hit' (ひつ) in a game — you need it to win! 'Hit' → 必要 (hitsuyō, 'necessary').
Cultural Note
In Japanese culture, expressing necessity politely is important. For example, 『必要です』 (hitsuyō desu, 'it is necessary') is commonly used in formal situations like work or requests.
Forms
Base: 必要Base na-adjective form. Used with 『な』 (na) before nouns, e.g., 『必要なもの』 (hitsuyō na mono, 'necessary thing').
Negative: 必要じゃないAdd 『じゃない』 (janai, 'not') after the base form → 『必要じゃない』 (hitsuyō janai).
Past: 必要だったAdd 『だった』 (datta, past) after the base form → 『必要だった』 (hitsuyō datta).
Adverbial: 必要にAdd 『に』 (ni, adverbial) after the base form → 『必要に』 (hitsuyō ni).
Comparative: より必要Comparative formed with modifier 『より』 (yori, 'more than') + base adjective.
Superlative: 一番必要Superlative formed with 『一番』 (ichiban, 'number one / Most') + adjective.