Ahzoh wrote: ↑Thu Jan 16, 2025 6:43 pmI find myself having difficulties finding use for many cases that can't be satisfied with a preposition phrase. (...) But again I always think "these could be convey with a preposition phrase", so I often remove them.
I don't understand this reasoning. Of course you can use prepositional phrases for everything. Heck, you could make a language where every argument takes the form of a prepositional phrase. What you need to decide is what you like better - having specific noun cases for various locative and directional meanings (cf. e.g. Finnish), or use prepositions (cf. e.g. English). There is no "use" for noun cases. They exist in some languages, and don't exist in others. It's your conlang, just make up your mind!
To begin with, from the Vrkhazhian's perspective, cases are divided into two categories: syntactic cases and adnominal cases.
You mean from the perspective of your con-people? Because "syntactic cases" doesn't make sense linguistically. And "adnominal case" just means "noun case".
Cases like the Nominative (and Vocative, which I consider a subcase of Nominative), Accusative, Ergative, and Instrumental cases would be syntactic cases as they can exist independently
Again, this reads like word salad. What does "exist independently" mean?
and contribute to the structure of the sentence.
In what way? Syntactic structure had nothing to do with
semantic structure, which seems what you're after here.
Adnominal cases would include the Genitive, Equative, Ablative, Locative, Comitative, Ornative (possessing X), and Privative (lacking X) cases, because they do not exist independently and instead serve as modifiers of other nouns and verbs.
Cases that "serve as modifiers of (...) nouns and verbs" - again, word salad.
Could say they're adjectivized/adverbialized nouns.
How can a case be an "adjectivized" noun? Or, reading between the lines, do you mean that a noun with a genitive a kind of adjective, like "John's book" is the same type of sentence as "the blue book" (where noth "John's" and "blue" modify "book")? If that's the case (no pun intended), how do these other cases you mention operate? How is "The book is table-LOC", the same type of construction? Or do you have something like "the on-the-table book is blue" in mind? If so, I still think you have a class of adjectivizers instead of noun cases.
to include the Instrumental (main purpose is to indicate the theme/secondary object of a ditransitive verb),
That would simply not be called an "instrumentive", unless you want to be purposely contrarian. The instrumental specifies the
instrument (what's in a name), and in no semantic analysis is the typical indirect object an instrument.
Anyways, I also have an applicative voice, which promotes oblique arguments to core arguments. So it always feels weird to mark the promoted oblique with accusative while the original core object is seemingly "demoted" from accusative marked to instrumental marked.
In my understanding, when an applicative voice is used to promote oblique arguments to core arguments, the are marked as would be fit for the position they're promoted too. The "original" argument is then moved out of the core, or just omitted, and typically marked with a preposition or the like. It shouldn't (as in, what is common) marked with another core argument noun case.
I feel like the indirective alignment would have no such problem, since the original object does not change case marking while the oblique is simply marked with the dative case. But again, indirective/dative alignment is boring.
Indirective is the alignment English uses (so yes, perhaps that's "boring"), but you seem confused here: the indirect object (marked or not with a dative) is a
core argument, not an oblique. So an oblique isn't marked with the dative, but rather with an oblique case or a preposition.
My possible work around is that only "inherent" ditransitives (not causative or applicative voice-marked) such as "give" have secundative alignment while causative and applicatives are employ double object construction.
Verbs are ditransitive when they have two core arguments. Applicatives decrease valency, I don't see what an "applicative voice-marked ditransitive" would be. (And causatives are a whole other ballpark.)
JAL