Godan verb (ぶ)

及ぶおよぶ

oyobu

to reach · N1

及ぶ (およぶ, oyobu) — to reach — is a godan verb ending in ぶ: 及んで (te-form), 及んだ (past), 及ばない (negative), 及びます (polite).

It also means to amount to; to befall.

How 及ぶ conjugates · godan ぶ-verb

Only the last kana changes: ぶ becomes ば, び, べ or ぼ.

Which one depends on the ending. The five are one line of the hiragana chart — same consonant, vowels あ・い・う・え・お — and everything before that kana never changes.

ば及ばないnegative

び及びますpolite present

ぶ及ぶdictionary form

べ及べるpotential及べばif

ぼ及ぼうvolitional

The て and た forms · ぶ → んで, んだん及んでte-form及んだpast

The て and た forms are the only two that don't follow this pattern. Every む-, ぶ- and ぬ-verb has the same んで there.

N5 N tags give the JLPT level at which the game starts quizzing a form.

Aa Dimmed forms are too rare in everyday Japanese for the game to quiz.

PLAIN

Form	Conjugation	Audio
present N5	及ぶおよぶ oyobu
past N5 It reached that far.	及んだおよんだ oyonda
negative N5 It doesn't come close.	及ばないおよばない oyobanai
te-form N5 It reaches that point and …	及んでおよんで oyonde
past negative N4 It didn't reach it.	及ばなかったおよばなかった oyobanakatta
volitional N4	及ぼうおよぼう oyobou
potential N3	及べるおよべる oyoberu
cond. ば N3 If it reaches it, ...	及べばおよべば oyobeba
cond. たら N3 When it reaches it, ...	及んだらおよんだら oyondara
passive N2	及ばれるおよばれる oyobareru
causative N2 I make it reach something.	及ばせるおよばせる oyobaseru
imperative N1	及べおよべ oyobe

POLITE

Form	Conjugation	Audio
present N5	及びますおよびます oyobimasu
past N5 It reached that far.	及びましたおよびました oyobimashita
negative N5 It doesn't come close.	及びませんおよびません oyobimasen
past negative N4 It didn't reach it.	及びませんでしたおよびませんでした oyobimasendeshita
volitional N4	及びましょうおよびましょう oyobimashou

ASPECT

Form	Conjugation	Audio
ている N4 It extends that far.	及んでいるおよんでいる oyondeiru
ていた N4 It had reached it.	及んでいたおよんでいた oyondeita
ています N4 It extends that far.	及んでいますおよんでいます oyondeimasu
ていました N4 It had reached it.	及んでいましたおよんでいました oyondeimashita