富む (tomu) conjugation
to be rich, to become rich
富む (とむ, tomu) 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 | 富む tomu | 富みます tomimasu | The form you look up. Also the casual present and future. |
| Plain negative | 富まない tomanai | 富みません tomimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 富んだ tonda | 富みました tomimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 富まなかった tomanakatta | 富みませんでした tomimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 富んで tonde | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 富んでいる tondeiru | 富んでいます tondeimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 富みたい tomitai | 富みたいです tomitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 富もう tomou | 富みましょう tomimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 富める tomeru | 富めます tomemasu | “can ~”. What you could do; the object often takes が. |
| Passive | 富まれる tomareru | 富まれます tomaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 富ませる tomaseru | 富ませます tomasemasu | Make or let someone do it. |
| Causative-passive | 富まされる tomasareru | 富まされます tomasaremasu | Be made to do it — the long one. |
| Imperative | 富め tome | 富んでください tondekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 富むな tomuna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 富めば tomeba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 富んだら tondara | — | “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.