及ぶ (oyobu) conjugation
to reach, to extend
及ぶ (およぶ, oyobu) 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 | 及ぶ oyobu | 及びます oyobimasu | The form you look up. Also the casual present and future. |
| Plain negative | 及ばない oyobanai | 及びません oyobimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 及んだ oyonda | 及びました oyobimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 及ばなかった oyobanakatta | 及びませんでした oyobimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 及んで oyonde | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 及んでいる oyondeiru | 及んでいます oyondeimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 及びたい oyobitai | 及びたいです oyobitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 及ぼう oyobou | 及びましょう oyobimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 及べる oyoberu | 及べます oyobemasu | “can ~”. What you could do; the object often takes が. |
| Passive | 及ばれる oyobareru | 及ばれます oyobaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 及ばせる oyobaseru | 及ばせます oyobasemasu | Make or let someone do it. |
| Causative-passive | 及ばされる oyobasareru | 及ばされます oyobasaremasu | Be made to do it — the long one. |
| Imperative | 及べ oyobe | 及んでください oyondekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 及ぶな oyobuna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 及べば oyobeba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 及んだら oyondara | — | “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.