心強い (kokorozuyoi) conjugation
heartening, reassuring
心強い (こころづよい, kokorozuyoi) 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 | 心強い kokorozuyoi | 心強いです kokorozuyoidesu | The form you look up. Also the casual “is ~”. |
| Negative | 心強くない kokorozuyokunai | 心強くないです kokorozuyokunaidesu | “is not ~”. |
| Past | 心強かった kokorozuyokatta | 心強かったです kokorozuyokattadesu | “was ~”. |
| Past negative | 心強くなかった kokorozuyokunakatta | 心強くなかったです kokorozuyokunakattadesu | “was not ~”. |
| Te-form | 心強くて kokorozuyokute | — | Links to the next clause: “~ and …”. |
| Adverb | 心強く kokorozuyoku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 心強い〜 kokorozuyoi〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 心強ければ kokorozuyokereba | — | “if it is ~”. |
| Conditional (~たら) | 心強かったら kokorozuyokattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 心強くなる kokorozuyokunaru | 心強くなります kokorozuyokunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 心強すぎる kokorozuyosugiru | 心強すぎます kokorozuyosugimasu | “too ~”. |
| Looks ~ (~そう) | 心強そう kokorozuyosou | 心強そうです kokorozuyosoudesu | “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.