豊か (yutaka) conjugation
abundant, wealthy, plentiful, rich
豊か (ゆたか, yutaka) 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 | 豊かだ yutakada | 豊かです yutakadesu | The form you look up. Also the casual “is ~”. |
| Negative | 豊かじゃない yutakajanai | 豊かじゃないです yutakajanaidesu | “is not ~”. |
| Past | 豊かだった yutakadatta | 豊かでした yutakadeshita | “was ~”. |
| Past negative | 豊かじゃなかった yutakajanakatta | 豊かじゃなかったです yutakajanakattadesu | “was not ~”. |
| Te-form | 豊かで yutakade | — | Links to the next clause: “~ and …”. |
| Adverb | 豊かに yutakani | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 豊かな〜 yutakana〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 豊かなら yutakanara | — | “if it is ~”. |
| Conditional (~たら) | 豊かだったら yutakadattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 豊かになる yutakaninaru | 豊かになります yutakaninarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 豊かすぎる yutakasugiru | 豊かすぎます yutakasugimasu | “too ~”. |
| Looks ~ (~そう) | 豊かそう yutakasou | 豊かそうです yutakasoudesu | “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.