ものすごい (monosugoi) conjugation
earth-shattering, staggering, to a very great extent
ものすごい (ものすごい, monosugoi) 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.
Written 物凄い in kanji, but usually written in kana alone.
Conjugation table
| Form | Plain (casual) | Polite (~です) | When you use it |
|---|---|---|---|
| Dictionary / plain | ものすごい monosugoi | ものすごいです monosugoidesu | The form you look up. Also the casual “is ~”. |
| Negative | ものすごくない monosugokunai | ものすごくないです monosugokunaidesu | “is not ~”. |
| Past | ものすごかった monosugokatta | ものすごかったです monosugokattadesu | “was ~”. |
| Past negative | ものすごくなかった monosugokunakatta | ものすごくなかったです monosugokunakattadesu | “was not ~”. |
| Te-form | ものすごくて monosugokute | — | Links to the next clause: “~ and …”. |
| Adverb | ものすごく monosugoku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | ものすごい〜 monosugoi〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | ものすごければ monosugokereba | — | “if it is ~”. |
| Conditional (~たら) | ものすごかったら monosugokattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | ものすごくなる monosugokunaru | ものすごくなります monosugokunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | ものすごすぎる monosugosugiru | ものすごすぎます monosugosugimasu | “too ~”. |
| Looks ~ (~そう) | ものすごそう monosugosou | ものすごそうです monosugosoudesu | “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.