青い (aoi) conjugation
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青い (あおい, aoi) 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 | 青い aoi | 青いです aoidesu | The form you look up. Also the casual “is ~”. |
| Negative | 青くない aokunai | 青くないです aokunaidesu | “is not ~”. |
| Past | 青かった aokatta | 青かったです aokattadesu | “was ~”. |
| Past negative | 青くなかった aokunakatta | 青くなかったです aokunakattadesu | “was not ~”. |
| Te-form | 青くて aokute | — | Links to the next clause: “~ and …”. |
| Adverb | 青く aoku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 青い〜 aoi〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 青ければ aokereba | — | “if it is ~”. |
| Conditional (~たら) | 青かったら aokattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 青くなる aokunaru | 青くなります aokunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 青すぎる aosugiru | 青すぎます aosugimasu | “too ~”. |
| Looks ~ (~そう) | 青そう aosou | 青そうです aosoudesu | “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.