思い掛けない (omoigakenai) conjugation
unexpected, casual
思い掛けない (おもいがけない, omoigakenai) 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 | 思い掛けない omoigakenai | 思い掛けないです omoigakenaidesu | The form you look up. Also the casual “is ~”. |
| Negative | 思い掛けなくない omoigakenakunai | 思い掛けなくないです omoigakenakunaidesu | “is not ~”. |
| Past | 思い掛けなかった omoigakenakatta | 思い掛けなかったです omoigakenakattadesu | “was ~”. |
| Past negative | 思い掛けなくなかった omoigakenakunakatta | 思い掛けなくなかったです omoigakenakunakattadesu | “was not ~”. |
| Te-form | 思い掛けなくて omoigakenakute | — | Links to the next clause: “~ and …”. |
| Adverb | 思い掛けなく omoigakenaku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 思い掛けない〜 omoigakenai〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 思い掛けなければ omoigakenakereba | — | “if it is ~”. |
| Conditional (~たら) | 思い掛けなかったら omoigakenakattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 思い掛けなくなる omoigakenakunaru | 思い掛けなくなります omoigakenakunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 思い掛けなすぎる omoigakenasugiru | 思い掛けなすぎます omoigakenasugimasu | “too ~”. |
| Looks ~ (~そう) | 思い掛けなそう omoigakenasou | 思い掛けなそうです omoigakenasoudesu | “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.