The Potential Verb Form in Japanese

The potential form (可能形, kanōkei) in Japanese is used to express that someone can do an action or that an action is possible. The conjugation rules differ based on the verb group. For Group 1 (u-verbs), you change the final dictionary vowel 'u' to 'e' and add 'ru'. For example, 'yomu' (to read) becomes 'yomeru' (can read). For Group 2 (ru-verbs), you replace the final 'ru' with 'られる' (rareru), meaning 'taberu' (to eat) becomes 'taberareru' (can eat). In casual spoken Japanese, Group 2 verbs are often shortened by dropping the 'ra' (e.g. 'tabereru').

For Group 3 (irregular verbs), 'suru' (to do) conjugates to its potential counterpart 'dekiru' (can do), and 'kuru' (to come) becomes 'korareru' (can come). When using the potential form, the direct object particle 'o' is frequently replaced by the subject particle 'ga' to focus on the object of ability, as in 'nihongo ga hanaseru' (I can speak Japanese). Understanding this form is essential for expressing skills, permission, and circumstantial possibilities in natural Japanese.