そそっかしい (sosokkashii) conjugation
careless, thoughtless
そそっかしい (そそっかしい, sosokkashii) 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 | そそっかしい sosokkashii | そそっかしいです sosokkashiidesu | The form you look up. Also the casual “is ~”. |
| Negative | そそっかしくない sosokkashikunai | そそっかしくないです sosokkashikunaidesu | “is not ~”. |
| Past | そそっかしかった sosokkashikatta | そそっかしかったです sosokkashikattadesu | “was ~”. |
| Past negative | そそっかしくなかった sosokkashikunakatta | そそっかしくなかったです sosokkashikunakattadesu | “was not ~”. |
| Te-form | そそっかしくて sosokkashikute | — | Links to the next clause: “~ and …”. |
| Adverb | そそっかしく sosokkashiku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | そそっかしい〜 sosokkashii〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | そそっかしければ sosokkashikereba | — | “if it is ~”. |
| Conditional (~たら) | そそっかしかったら sosokkashikattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | そそっかしくなる sosokkashikunaru | そそっかしくなります sosokkashikunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | そそっかしすぎる sosokkashisugiru | そそっかしすぎます sosokkashisugimasu | “too ~”. |
| Looks ~ (~そう) | そそっかしそう sosokkashisou | そそっかしそうです sosokkashisoudesu | “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.