大幅 (oohaba) conjugation
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大幅 (おおはば, oohaba) is a na-adjective. Na-adjectives behave like nouns. The word itself never changes — you conjugate だ/です after it, and you need な to put it in front of a noun.
Conjugation table
| Form | Plain (casual) | Polite (~です) | When you use it |
|---|---|---|---|
| Dictionary / plain | 大幅だ oohabada | 大幅です oohabadesu | The form you look up. Also the casual “is ~”. |
| Negative | 大幅じゃない oohabajanai | 大幅じゃないです oohabajanaidesu | “is not ~”. |
| Past | 大幅だった oohabadatta | 大幅でした oohabadeshita | “was ~”. |
| Past negative | 大幅じゃなかった oohabajanakatta | 大幅じゃなかったです oohabajanakattadesu | “was not ~”. |
| Te-form | 大幅で oohabade | — | Links to the next clause: “~ and …”. |
| Adverb | 大幅に oohabani | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 大幅な〜 oohabana〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 大幅なら oohabanara | — | “if it is ~”. |
| Conditional (~たら) | 大幅だったら oohabadattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 大幅になる oohabaninaru | 大幅になります oohabaninarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 大幅すぎる oohabasugiru | 大幅すぎます oohabasugimasu | “too ~”. |
| Looks ~ (~そう) | 大幅そう oohabasou | 大幅そうです oohabasoudesu | “looks / seems ~” from appearance. |
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Why it conjugates this way
Na-adjectives behave like nouns. The word itself never changes — you conjugate だ/です after it, and you need な to put it in front of a noun.
See the full rules in the adjective conjugation guide.