汚い (kitanai) conjugation
dirty, unclean, filthy
汚い (きたない, kitanai) 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 | 汚い kitanai | 汚いです kitanaidesu | The form you look up. Also the casual “is ~”. |
| Negative | 汚くない kitanakunai | 汚くないです kitanakunaidesu | “is not ~”. |
| Past | 汚かった kitanakatta | 汚かったです kitanakattadesu | “was ~”. |
| Past negative | 汚くなかった kitanakunakatta | 汚くなかったです kitanakunakattadesu | “was not ~”. |
| Te-form | 汚くて kitanakute | — | Links to the next clause: “~ and …”. |
| Adverb | 汚く kitanaku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 汚い〜 kitanai〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 汚ければ kitanakereba | — | “if it is ~”. |
| Conditional (~たら) | 汚かったら kitanakattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 汚くなる kitanakunaru | 汚くなります kitanakunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 汚すぎる kitanasugiru | 汚すぎます kitanasugimasu | “too ~”. |
| Looks ~ (~そう) | 汚そう kitanasou | 汚そうです kitanasoudesu | “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.