完ぺき (kanpeki) conjugation
perfection, completeness, flawless
完ぺき (かんぺき, kanpeki) 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 | 完ぺきだ kanpekida | 完ぺきです kanpekidesu | The form you look up. Also the casual “is ~”. |
| Negative | 完ぺきじゃない kanpekijanai | 完ぺきじゃないです kanpekijanaidesu | “is not ~”. |
| Past | 完ぺきだった kanpekidatta | 完ぺきでした kanpekideshita | “was ~”. |
| Past negative | 完ぺきじゃなかった kanpekijanakatta | 完ぺきじゃなかったです kanpekijanakattadesu | “was not ~”. |
| Te-form | 完ぺきで kanpekide | — | Links to the next clause: “~ and …”. |
| Adverb | 完ぺきに kanpekini | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 完ぺきな〜 kanpekina〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 完ぺきなら kanpekinara | — | “if it is ~”. |
| Conditional (~たら) | 完ぺきだったら kanpekidattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 完ぺきになる kanpekininaru | 完ぺきになります kanpekininarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 完ぺきすぎる kanpekisugiru | 完ぺきすぎます kanpekisugimasu | “too ~”. |
| Looks ~ (~そう) | 完ぺきそう kanpekisou | 完ぺきそうです kanpekisoudesu | “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.