熱する (nessuru) conjugation
to heat
熱する (ねっする, nessuru) 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 | 熱する nessuru | 熱します nesshimasu | The form you look up. Also the casual present and future. |
| Plain negative | 熱しない nesshinai | 熱しません nesshimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 熱した nesshita | 熱しました nesshimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 熱しなかった nesshinakatta | 熱しませんでした nesshimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 熱して nesshite | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 熱している nesshiteiru | 熱しています nesshiteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 熱したい nesshitai | 熱したいです nesshitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 熱しよう nesshiyou | 熱しましょう nesshimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 熱できる neddekiru | 熱できます neddekimasu | “can ~”. What you could do; the object often takes が. |
| Passive | 熱される nessareru | 熱されます nessaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 熱させる nessaseru | 熱させます nessasemasu | Make or let someone do it. |
| Causative-passive | 熱させられる nessaserareru | 熱させられます nessaseraremasu | Be made to do it — the long one. |
| Imperative | 熱しろ nesshiro | 熱してください nesshitekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 熱するな nessuruna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 熱すれば nessureba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 熱したら nesshitara | — | “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.