- u verbs / Group 1 verbs / 五段活用
- ru verbs / Group 2 verbs / 一段活用
- Irregular verbs / Group 3 verbs / 不規則動詞
>or do some books teach "the -suru verbs" as the third group (instead of "suru" being a single irregular verb that you can attach nouns to)?
In books for native speakers instead of having irregular verbs they have:
- サ行変格活用 which are the suru and noun + する verbs
- カ行変格活用 which are the kuru verbs.
- u verbs / Group 1 verbs / 五段活用
- ru verbs / Group 2 verbs / 一段活用
- Irregular verbs / Group 3 verbs / 不規則動詞
>or do some books teach "the -suru verbs" as the third group (instead of "suru" being a single irregular verb that you can attach nouns to)?
In books for native speakers instead of having irregular verbs they have:
- サ行変格活用 which are the suru and noun + する verbs
- カ行変格活用 which are the kuru verbs.