鋭い (surudoi) conjugation
pointed, sharp
鋭い (するどい, surudoi) 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 | 鋭い surudoi | 鋭いです surudoidesu | The form you look up. Also the casual “is ~”. |
| Negative | 鋭くない surudokunai | 鋭くないです surudokunaidesu | “is not ~”. |
| Past | 鋭かった surudokatta | 鋭かったです surudokattadesu | “was ~”. |
| Past negative | 鋭くなかった surudokunakatta | 鋭くなかったです surudokunakattadesu | “was not ~”. |
| Te-form | 鋭くて surudokute | — | Links to the next clause: “~ and …”. |
| Adverb | 鋭く surudoku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 鋭い〜 surudoi〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 鋭ければ surudokereba | — | “if it is ~”. |
| Conditional (~たら) | 鋭かったら surudokattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 鋭くなる surudokunaru | 鋭くなります surudokunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 鋭すぎる surudosugiru | 鋭すぎます surudosugimasu | “too ~”. |
| Looks ~ (~そう) | 鋭そう surudosou | 鋭そうです surudosoudesu | “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.