滑稽 (kokkei) conjugation
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滑稽 (こっけい, kokkei) 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 | 滑稽だ kokkeida | 滑稽です kokkeidesu | The form you look up. Also the casual “is ~”. |
| Negative | 滑稽じゃない kokkeijanai | 滑稽じゃないです kokkeijanaidesu | “is not ~”. |
| Past | 滑稽だった kokkeidatta | 滑稽でした kokkeideshita | “was ~”. |
| Past negative | 滑稽じゃなかった kokkeijanakatta | 滑稽じゃなかったです kokkeijanakattadesu | “was not ~”. |
| Te-form | 滑稽で kokkeide | — | Links to the next clause: “~ and …”. |
| Adverb | 滑稽に kokkeini | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 滑稽な〜 kokkeina〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 滑稽なら kokkeinara | — | “if it is ~”. |
| Conditional (~たら) | 滑稽だったら kokkeidattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 滑稽になる kokkeininaru | 滑稽になります kokkeininarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 滑稽すぎる kokkeisugiru | 滑稽すぎます kokkeisugimasu | “too ~”. |
| Looks ~ (~そう) | 滑稽そう kokkeisou | 滑稽そうです kokkeisoudesu | “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.