黄色い (kiiroi) conjugation
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黄色い (きいろい, kiiroi) is an i-adjective. I-adjectives carry their own tense: drop the final い and the endings attach straight to the stem. No だ, no です needed to make a complete sentence.
Conjugation table
| Form | Plain (casual) | Polite (~です) | When you use it |
|---|---|---|---|
| Dictionary / plain | 黄色い kiiroi | 黄色いです kiiroidesu | The form you look up. Also the casual “is ~”. |
| Negative | 黄色くない kiirokunai | 黄色くないです kiirokunaidesu | “is not ~”. |
| Past | 黄色かった kiirokatta | 黄色かったです kiirokattadesu | “was ~”. |
| Past negative | 黄色くなかった kiirokunakatta | 黄色くなかったです kiirokunakattadesu | “was not ~”. |
| Te-form | 黄色くて kiirokute | — | Links to the next clause: “~ and …”. |
| Adverb | 黄色く kiiroku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 黄色い〜 kiiroi〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 黄色ければ kiirokereba | — | “if it is ~”. |
| Conditional (~たら) | 黄色かったら kiirokattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 黄色くなる kiirokunaru | 黄色くなります kiirokunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 黄色すぎる kiirosugiru | 黄色すぎます kiirosugimasu | “too ~”. |
| Looks ~ (~そう) | 黄色そう kiirosou | 黄色そうです kiirosoudesu | “looks / seems ~” from appearance. |
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Why it conjugates this way
I-adjectives carry their own tense: drop the final い and the endings attach straight to the stem. No だ, no です needed to make a complete sentence.
See the full rules in the adjective conjugation guide.