力強い (chikarazuyoi) conjugation
powerful, strong, vigorous
力強い (ちからづよい, chikarazuyoi) 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 | 力強い chikarazuyoi | 力強いです chikarazuyoidesu | The form you look up. Also the casual “is ~”. |
| Negative | 力強くない chikarazuyokunai | 力強くないです chikarazuyokunaidesu | “is not ~”. |
| Past | 力強かった chikarazuyokatta | 力強かったです chikarazuyokattadesu | “was ~”. |
| Past negative | 力強くなかった chikarazuyokunakatta | 力強くなかったです chikarazuyokunakattadesu | “was not ~”. |
| Te-form | 力強くて chikarazuyokute | — | Links to the next clause: “~ and …”. |
| Adverb | 力強く chikarazuyoku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 力強い〜 chikarazuyoi〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 力強ければ chikarazuyokereba | — | “if it is ~”. |
| Conditional (~たら) | 力強かったら chikarazuyokattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 力強くなる chikarazuyokunaru | 力強くなります chikarazuyokunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 力強すぎる chikarazuyosugiru | 力強すぎます chikarazuyosugimasu | “too ~”. |
| Looks ~ (~そう) | 力強そう chikarazuyosou | 力強そうです chikarazuyosoudesu | “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.