頻繁 (hinpan) conjugation
frequency
頻繁 (ひんぱん, hinpan) is a na-adjective. Na-adjectives behave like nouns. The word itself never changes — you conjugate だ/です after it, and you need な to put it in front of a noun.
Conjugation table
| Form | Plain (casual) | Polite (~です) | When you use it |
|---|---|---|---|
| Dictionary / plain | 頻繁だ hinpanda | 頻繁です hinpandesu | The form you look up. Also the casual “is ~”. |
| Negative | 頻繁じゃない hinpanjanai | 頻繁じゃないです hinpanjanaidesu | “is not ~”. |
| Past | 頻繁だった hinpandatta | 頻繁でした hinpandeshita | “was ~”. |
| Past negative | 頻繁じゃなかった hinpanjanakatta | 頻繁じゃなかったです hinpanjanakattadesu | “was not ~”. |
| Te-form | 頻繁で hinpande | — | Links to the next clause: “~ and …”. |
| Adverb | 頻繁に hinpanni | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 頻繁な〜 hinpanna〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 頻繁なら hinpannara | — | “if it is ~”. |
| Conditional (~たら) | 頻繁だったら hinpandattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 頻繁になる hinpanninaru | 頻繁になります hinpanninarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 頻繁すぎる hinpansugiru | 頻繁すぎます hinpansugimasu | “too ~”. |
| Looks ~ (~そう) | 頻繁そう hinpansou | 頻繁そうです hinpansoudesu | “looks / seems ~” from appearance. |
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Why it conjugates this way
Na-adjectives behave like nouns. The word itself never changes — you conjugate だ/です after it, and you need な to put it in front of a noun.
See the full rules in the adjective conjugation guide.