潰す (tsubusu) conjugation
to smash, to waste
潰す (つぶす, tsubusu) 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 | 潰す tsubusu | 潰します tsubushimasu | The form you look up. Also the casual present and future. |
| Plain negative | 潰さない tsubusanai | 潰しません tsubushimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 潰した tsubushita | 潰しました tsubushimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 潰さなかった tsubusanakatta | 潰しませんでした tsubushimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 潰して tsubushite | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 潰している tsubushiteiru | 潰しています tsubushiteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 潰したい tsubushitai | 潰したいです tsubushitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 潰そう tsubusou | 潰しましょう tsubushimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 潰せる tsubuseru | 潰せます tsubusemasu | “can ~”. What you could do; the object often takes が. |
| Passive | 潰される tsubusareru | 潰されます tsubusaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 潰させる tsubusaseru | 潰させます tsubusasemasu | Make or let someone do it. |
| Causative-passive | 潰させられる tsubusaserareru | 潰させられます tsubusaseraremasu | Be made to do it — the long one. |
| Imperative | 潰せ tsubuse | 潰してください tsubushitekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 潰すな tsubusuna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 潰せば tsubuseba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 潰したら tsubushitara | — | “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.