正しい (tadashii) conjugation
correct
正しい (ただしい, tadashii) 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 | 正しい tadashii | 正しいです tadashiidesu | The form you look up. Also the casual “is ~”. |
| Negative | 正しくない tadashikunai | 正しくないです tadashikunaidesu | “is not ~”. |
| Past | 正しかった tadashikatta | 正しかったです tadashikattadesu | “was ~”. |
| Past negative | 正しくなかった tadashikunakatta | 正しくなかったです tadashikunakattadesu | “was not ~”. |
| Te-form | 正しくて tadashikute | — | Links to the next clause: “~ and …”. |
| Adverb | 正しく tadashiku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 正しい〜 tadashii〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 正しければ tadashikereba | — | “if it is ~”. |
| Conditional (~たら) | 正しかったら tadashikattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 正しくなる tadashikunaru | 正しくなります tadashikunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 正しすぎる tadashisugiru | 正しすぎます tadashisugimasu | “too ~”. |
| Looks ~ (~そう) | 正しそう tadashisou | 正しそうです tadashisoudesu | “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.