causative passive potential form


I've been reading into a little bit of more advanced grammar and am trying to
get my head around the causative and the passive form. (yes yes N1 people.
That's not actually advanced.)

The causative I think I can grasp and the passive form makes sense when
English examples are given. Using them and recognising them in practice will
of course be a different matter….but anyway.

One confusing thing was the similarity to the potential form. I saw a question
elsewhere on this site which said you could tell the difference the bulk of
the time since with the passive there will be a に。

Which is fair enough.

But then we come to the causative passive form. Which means someone made me do
something (why does that need to be passive?) and it made me wonder…is there
such a thing as a causative passive potential form?

What I mean is how would you get across sentences such as “It is possible that
she may make you eat her cooking”? It strikes me that the double
passive/potential makes this a somewhat iffy proposition.




Technically, it exists, but as a Japanese-speaker, I would NOT recommend that
you actively use it --- at least not on a regular basis.

As @Chocolate stated in the comment above, 「～～させられうる」 is the form. Your
sentence “It is possible that she may make you eat her cooking.” can be said
in Japanese as:

> 「ボクは[彼女]{かのじょ}に[自分]{じぶん}の[料理]{りょうり}を[食]{た}べ **させられうる** 。」

This is 100% grammatical with the 6 kana at the very end expressing exactly "
**causative, passive and potential** " in that order.

Is it something native speakers would say in a natural setting then? _**No,
not at all**_. It would not only sound very awkward but also lend itself to
misunderstanding by the listener or reader. "Three different elements in just
6 kana" is too much cramming, leaving no room for mis-hearing or mis-reading
even one of the six syllables.

It would look/sound much more natural if you said:

> 「彼女に自分の料理を食べさせられるかも[知]{し}れない。」 or
>
> 「彼女に自分の料理を食べさせられる[可能性]{かのうせい}がある。」

What I did was to use other words （かも知れない and 可能性がある） to express the
potentiality without relying exclusively on the verb and auxiliary verb
conjugations to express all three elements (causative, passive and potential).
The 「食べさせられる」 part only expresses causative and passive.

