What does putting ある before something do? It seems similar to putting verbs before nouns (or noun phrases) in general, but I can never pin down what it actually means.
For example, here is the sample sentence from 処分:
私の息子は、ある生徒に苛めを行い、退学処分を受けました。
In this particular example, it’s not entirely clear to me what ある is modifying. Considering 生徒 alone would use いる (right?), I’d guess that it’s modifying the whole noun phrase 生徒に苛めを行い. But even if I’m correct on that, I still don’t get what ある actually does by modifying the noun phrase.
