Japanese Verb & Adjective Conjugation Practice (Free, Interactive)

A free interactive Japanese conjugation trainer: see the dictionary form, type the requested form (te-form, ta-form, nai-form, potential, masu-form), and get instant feedback with rule explanations. Ideal for JLPT N5-N3 learners building a solid conjugation base.

The Three Japanese Verb Groups

• Godan (u-verbs): conjugate by the final kana, e.g. 書く→書いて, 読む→読んで.
• Ichidan (ru-verbs): drop る and attach, e.g. 食べる→食べて.
• Irregular: する→して/した/しない/できる; 来る→来て/来た/来ない/来られる.

Godan te-form / ta-form Sound Changes

• う・つ・る to って/った
• む・ぶ・ぬ to んで/んだ
• く to いて/いた (exception: 行く→行って)
• ぐ to いで/いだ
• す to して/した

Other Common Forms

• nai-form (negative): Godan final u-row to a-row + ない; Ichidan drop る + ない.
• potential form: Godan final u-row to e-row + る; Ichidan drop る + られる.
• i-adjectives: te-form →くて, past →かった, negative →くない (いい is irregular →よくて).

For full explanations see the Grammar Hub; to drill more, visit the JLPT Challenge (10,000+ free questions).