- 1. [adj-na] {math} reduced
Conjugation — Adjective (―na)
This word itself does not change -- these are forms of the copula だ ("to be") attached to it.
| Attributive (before a noun) | ひやくな | (hiyakuna) |
| Non-past, plain | ひやくだ | (hiyakuda) |
| Non-past, polite | ひやくです | (hiyakudesu) |
| Past, plain | ひやくだった | (hiyakudatta) |
| Past, polite | ひやくでした | (hiyakudeshita) |
| Negative, plain | ひやくじゃない | (hiyakujanai) |
| Negative, polite | ひやくじゃないです | (hiyakujanaidesu) |
| Past negative, plain | ひやくじゃなかった | (hiyakujanakatta) |
| Past negative, polite | ひやくじゃなかったです | (hiyakujanakattadesu) |
| Te-form | ひやくで | (hiyakude) |
| Conditional (―nara) | ひやくなら | (hiyakunara) |