I'm a native speaker, and I wasn't even aware of partitive case. They never taught us about it, even though a mind-numbing amount of time was spent cramming the name of the usual six cases into our heads.
I only got more interested in linguistics after moving to the US, and, sadly, only took one class in college on it.
Thanks for noticing this, I just learned something!
As a side note, I also mixed up genitive and accusative cases.
I'm a native speaker, and I wasn't even aware of partitive case. They never taught us about it, even though a mind-numbing amount of time was spent cramming the name of the usual six cases into our heads.
I only got more interested in linguistics after moving to the US, and, sadly, only took one class in college on it.
Thanks for noticing this, I just learned something!
As a side note, I also mixed up genitive and accusative cases.
[1]https://en.wikipedia.org/wiki/Partitive_case#Russian