著しい (ichijirushii) conjugation
remarkable, considerable
著しい (いちじるしい, ichijirushii) 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 | 著しい ichijirushii | 著しいです ichijirushiidesu | The form you look up. Also the casual “is ~”. |
| Negative | 著しくない ichijirushikunai | 著しくないです ichijirushikunaidesu | “is not ~”. |
| Past | 著しかった ichijirushikatta | 著しかったです ichijirushikattadesu | “was ~”. |
| Past negative | 著しくなかった ichijirushikunakatta | 著しくなかったです ichijirushikunakattadesu | “was not ~”. |
| Te-form | 著しくて ichijirushikute | — | Links to the next clause: “~ and …”. |
| Adverb | 著しく ichijirushiku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 著しい〜 ichijirushii〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 著しければ ichijirushikereba | — | “if it is ~”. |
| Conditional (~たら) | 著しかったら ichijirushikattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 著しくなる ichijirushikunaru | 著しくなります ichijirushikunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 著しすぎる ichijirushisugiru | 著しすぎます ichijirushisugimasu | “too ~”. |
| Looks ~ (~そう) | 著しそう ichijirushisou | 著しそうです ichijirushisoudesu | “looks / seems ~” from appearance. |
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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.