元気 (genki) conjugation
health(y), energetic
元気 (げんき, genki) 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 | 元気だ genkida | 元気です genkidesu | The form you look up. Also the casual “is ~”. |
| Negative | 元気じゃない genkijanai | 元気じゃないです genkijanaidesu | “is not ~”. |
| Past | 元気だった genkidatta | 元気でした genkideshita | “was ~”. |
| Past negative | 元気じゃなかった genkijanakatta | 元気じゃなかったです genkijanakattadesu | “was not ~”. |
| Te-form | 元気で genkide | — | Links to the next clause: “~ and …”. |
| Adverb | 元気に genkini | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 元気な〜 genkina〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 元気なら genkinara | — | “if it is ~”. |
| Conditional (~たら) | 元気だったら genkidattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 元気になる genkininaru | 元気になります genkininarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 元気すぎる genkisugiru | 元気すぎます genkisugimasu | “too ~”. |
| Looks ~ (~そう) | 元気そう genkisou | 元気そうです genkisoudesu | “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.