いろいろ (iroiro) conjugation
various
いろいろ (いろいろ, iroiro) 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.
Written 色々 in kanji, but usually written in kana alone.
Conjugation table
| Form | Plain (casual) | Polite (~です) | When you use it |
|---|---|---|---|
| Dictionary / plain | いろいろだ iroiroda | いろいろです iroirodesu | The form you look up. Also the casual “is ~”. |
| Negative | いろいろじゃない iroirojanai | いろいろじゃないです iroirojanaidesu | “is not ~”. |
| Past | いろいろだった iroirodatta | いろいろでした iroirodeshita | “was ~”. |
| Past negative | いろいろじゃなかった iroirojanakatta | いろいろじゃなかったです iroirojanakattadesu | “was not ~”. |
| Te-form | いろいろで iroirode | — | Links to the next clause: “~ and …”. |
| Adverb | いろいろに iroironi | — | Turns it into “~ly”, describing a verb. |
| Before a noun | いろいろな〜 iroirona〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | いろいろなら iroironara | — | “if it is ~”. |
| Conditional (~たら) | いろいろだったら iroirodattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | いろいろになる iroironinaru | いろいろになります iroironinarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | いろいろすぎる iroirosugiru | いろいろすぎます iroirosugimasu | “too ~”. |
| Looks ~ (~そう) | いろいろそう iroirosou | いろいろそうです iroirosoudesu | “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.