楽しい (tanoshii) conjugation
enjoyable, fun
楽しい (たのしい, tanoshii) 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 | 楽しい tanoshii | 楽しいです tanoshiidesu | The form you look up. Also the casual “is ~”. |
| Negative | 楽しくない tanoshikunai | 楽しくないです tanoshikunaidesu | “is not ~”. |
| Past | 楽しかった tanoshikatta | 楽しかったです tanoshikattadesu | “was ~”. |
| Past negative | 楽しくなかった tanoshikunakatta | 楽しくなかったです tanoshikunakattadesu | “was not ~”. |
| Te-form | 楽しくて tanoshikute | — | Links to the next clause: “~ and …”. |
| Adverb | 楽しく tanoshiku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 楽しい〜 tanoshii〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 楽しければ tanoshikereba | — | “if it is ~”. |
| Conditional (~たら) | 楽しかったら tanoshikattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 楽しくなる tanoshikunaru | 楽しくなります tanoshikunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 楽しすぎる tanoshisugiru | 楽しすぎます tanoshisugimasu | “too ~”. |
| Looks ~ (~そう) | 楽しそう tanoshisou | 楽しそうです tanoshisoudesu | “looks / seems ~” from appearance. |
🔊 Tap any Japanese word to hear it spoken.
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.