延びる (nobiru) conjugation
to be prolonged
延びる (のびる, nobiru) is an ichidan verb. Ichidan verbs are the tidy ones: drop the final る and add the ending. Nothing inside the word ever changes. 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 | 延びる nobiru | 延びます nobimasu | The form you look up. Also the casual present and future. |
| Plain negative | 延びない nobinai | 延びません nobimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 延びた nobita | 延びました nobimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 延びなかった nobinakatta | 延びませんでした nobimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 延びて nobite | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 延びている nobiteiru | 延びています nobiteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 延びたい nobitai | 延びたいです nobitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 延びよう nobiyou | 延びましょう nobimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 延びられる nobirareru | 延びられます nobiraremasu | “can ~”. What you could do; the object often takes が. |
| Passive | 延びられる nobirareru | 延びられます nobiraremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 延びさせる nobisaseru | 延びさせます nobisasemasu | Make or let someone do it. |
| Causative-passive | 延びさせられる nobisaserareru | 延びさせられます nobisaseraremasu | Be made to do it — the long one. |
| Imperative | 延びろ nobiro | 延びてください nobitekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 延びるな nobiruna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 延びれば nobireba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 延びたら nobitara | — | “if / when ~”. The everyday conditional. |
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Why it conjugates this way
Ichidan verbs are the tidy ones: drop the final る and add the ending. Nothing inside the word ever changes.
See the full rules on the verb conjugation guide.