高級 (koukyuu) conjugation
high class; first-rate
高級 (こうきゅう, koukyuu) 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 | 高級だ koukyuuda | 高級です koukyuudesu | The form you look up. Also the casual “is ~”. |
| Negative | 高級じゃない koukyuujanai | 高級じゃないです koukyuujanaidesu | “is not ~”. |
| Past | 高級だった koukyuudatta | 高級でした koukyuudeshita | “was ~”. |
| Past negative | 高級じゃなかった koukyuujanakatta | 高級じゃなかったです koukyuujanakattadesu | “was not ~”. |
| Te-form | 高級で koukyuude | — | Links to the next clause: “~ and …”. |
| Adverb | 高級に koukyuuni | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 高級な〜 koukyuuna〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 高級なら koukyuunara | — | “if it is ~”. |
| Conditional (~たら) | 高級だったら koukyuudattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 高級になる koukyuuninaru | 高級になります koukyuuninarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 高級すぎる koukyuusugiru | 高級すぎます koukyuusugimasu | “too ~”. |
| Looks ~ (~そう) | 高級そう koukyuusou | 高級そうです koukyuusoudesu | “looks / seems ~” from appearance. |
🔊 Tap any Japanese word to hear it spoken.
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.