How do Japanese people infer if a verb is a ichidan verb or a godan ending in ru?


In Japan, if a Japanese person sees a new verb ending in ru, what would they
do to try and infer if it's a ichidan or godan verb before just looking it up
or asking someone?




When native Japanese speakers encounter or coin new verbs, such verbs are
**assumed to be godan verbs** , despite the fact that many ordinary verbs that
end with -i-ru/-e-ru are ichidan-verbs. Here I'm talking about native Japanese
adults who can conjugate common verbs like 切る/着る/帰る/変える without thinking. And
native speakers don't usually think about verb types; verb types are something
we learn at middle school, but most people forget about that soon after they
graduate.

For example, when you present an imaginary verb あべる to a native speaker and
tell them to conjugate it in various ways, the response would be
「あべらない」「あべります」「あべって」「あべれ」 rather than 「あべない」「あべます」「あべて」「あべろ」. Likewise, the
conjugation of an imaginary verb れぴる would be 「れぴらない」「れぴります」「れぴれ」「れぴろう」 rather
than 「れぴない」「れぴます」「れぴろ」「れぴよう」.

This I think is because [all verbs that were recently coined from loanwords
are godan-verbs](https://japanese.stackexchange.com/q/24351/5010).
[コピる](http://jisho.org/search/%E3%82%B3%E3%83%94%E3%82%8B) is an example of
godan verbs that may look like ichidan at first (We say コピれ but not コピろ).




When native Japanese speakers encounter or coin new verbs, such verbs are
**assumed to be godan verbs** , despite the fact that many ordinary verbs that
end with -i-ru/-e-ru are ichidan-verbs. Here I'm talking about native Japanese
adults who can conjugate common verbs like 切る/着る/帰る/変える without thinking. And
native speakers don't usually think about verb types; verb types are something
we learn at middle school, but most people forget about that soon after they
graduate.

For example, when you present an imaginary verb あべる to a native speaker and
tell them to conjugate it in various ways, the response would be
「あべらない」「あべります」「あべって」「あべれ」 rather than 「あべない」「あべます」「あべて」「あべろ」. Likewise, the
conjugation of an imaginary verb れぴる would be 「れぴらない」「れぴります」「れぴれ」「れぴろう」 rather
than 「れぴない」「れぴます」「れぴろ」「れぴよう」.

This I think is because [all verbs that were recently coined from loanwords
are godan-verbs](https://japanese.stackexchange.com/q/24351/5010).
[コピる](http://jisho.org/search/%E3%82%B3%E3%83%94%E3%82%8B) is an example of
godan verbs that may look like ichidan at first (We say コピれ but not コピろ).

