積極的 (sekkyokuteki) conjugation
positive, active, proactive
積極的 (せっきょくてき, sekkyokuteki) 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 | 積極的だ sekkyokutekida | 積極的です sekkyokutekidesu | The form you look up. Also the casual “is ~”. |
| Negative | 積極的じゃない sekkyokutekijanai | 積極的じゃないです sekkyokutekijanaidesu | “is not ~”. |
| Past | 積極的だった sekkyokutekidatta | 積極的でした sekkyokutekideshita | “was ~”. |
| Past negative | 積極的じゃなかった sekkyokutekijanakatta | 積極的じゃなかったです sekkyokutekijanakattadesu | “was not ~”. |
| Te-form | 積極的で sekkyokutekide | — | Links to the next clause: “~ and …”. |
| Adverb | 積極的に sekkyokutekini | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 積極的な〜 sekkyokutekina〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 積極的なら sekkyokutekinara | — | “if it is ~”. |
| Conditional (~たら) | 積極的だったら sekkyokutekidattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 積極的になる sekkyokutekininaru | 積極的になります sekkyokutekininarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 積極的すぎる sekkyokutekisugiru | 積極的すぎます sekkyokutekisugimasu | “too ~”. |
| Looks ~ (~そう) | 積極的そう sekkyokutekisou | 積極的そうです sekkyokutekisoudesu | “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.