値する (ataisuru) conjugation
to be worth, to deserve
値する (あたいする, ataisuru) is an irregular verb. Only する and 来る are truly irregular, and every learner meets them in week one. 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 | 値する ataisuru | 値します ataishimasu | The form you look up. Also the casual present and future. |
| Plain negative | 値しない ataishinai | 値しません ataishimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 値した ataishita | 値しました ataishimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 値しなかった ataishinakatta | 値しませんでした ataishimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 値して ataishite | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 値している ataishiteiru | 値しています ataishiteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 値したい ataishitai | 値したいです ataishitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 値しよう ataishiyou | 値しましょう ataishimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 値できる ataidekiru | 値できます ataidekimasu | “can ~”. What you could do; the object often takes が. |
| Passive | 値される ataisareru | 値されます ataisaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 値させる ataisaseru | 値させます ataisasemasu | Make or let someone do it. |
| Causative-passive | 値させられる ataisaserareru | 値させられます ataisaseraremasu | Be made to do it — the long one. |
| Imperative | 値しろ ataishiro | 値してください ataishitekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 値するな ataisuruna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 値すれば ataisureba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 値したら ataishitara | — | “if / when ~”. The everyday conditional. |
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Why it conjugates this way
Only する and 来る are truly irregular, and every learner meets them in week one.
See the full rules on the verb conjugation guide.