明かす (akasu) conjugation
to reveal; to stay up
明かす (あかす, akasu) is a godan verb. Godan verbs change their final kana up and down its column of the kana chart — the a-row for negatives, the i-row before ます, the e-row for potential and ば. Every form below is tappable — hear it, then say it back.
Conjugation table
| Form | Plain (casual) | Polite (~ます) | When you use it |
|---|---|---|---|
| Dictionary / plain | 明かす akasu | 明かします akashimasu | The form you look up. Also the casual present and future. |
| Plain negative | 明かさない akasanai | 明かしません akashimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 明かした akashita | 明かしました akashimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 明かさなかった akasanakatta | 明かしませんでした akashimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 明かして akashite | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 明かしている akashiteiru | 明かしています akashiteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 明かしたい akashitai | 明かしたいです akashitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 明かそう akasou | 明かしましょう akashimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 明かせる akaseru | 明かせます akasemasu | “can ~”. What you could do; the object often takes が. |
| Passive | 明かされる akasareru | 明かされます akasaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 明かさせる akasaseru | 明かさせます akasasemasu | Make or let someone do it. |
| Causative-passive | 明かさせられる akasaserareru | 明かさせられます akasaseraremasu | Be made to do it — the long one. |
| Imperative | 明かせ akase | 明かしてください akashitekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 明かすな akasuna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 明かせば akaseba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 明かしたら akashitara | — | “if / when ~”. The everyday conditional. |
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Why it conjugates this way
Godan verbs change their final kana up and down its column of the kana chart — the a-row for negatives, the i-row before ます, the e-row for potential and ば.
See the full rules on the verb conjugation guide.