Yesterday I asked a question about the meaning of "научись," and it turned out that in the movie in which I heard this, it was not "научись," but "на, учись," where "на" is a particle.
Reading about the particle "на," I just accidentally discovered that "на" is the second person singular form, whilst the second person plural form is "нате"; that is, if I got things right, it is correct to say "нате, учитесь" and "на, учись."
I have always been sure that particles do not inflect. After all, they are particles! How can the uninflectable inflect?! I am shocked. This is such a strong blow. I am at a loss and afraid that other particles inflect as well.
My question is this: Which other particles inflect, and how do they inflect?
Of course, additional explanations about the logic and reason of particle inflection are very welcome. It is always nice to understand rather than to blindly learn.