I know the title does not make much sense, sorry about that.
In short, what I mean is, how can I mention about one certain thing (not one thing in amount) in Japanese?
For example "one morning" in the following sentence:
As Gregor Samsa awoke one morning from uneasy dreams he found himself transformed in his bed into a gigantic insect.
I come accross some usages like "あるX". For instance:
- One morning -> ある朝
- One day -> ある日
Is this ある may be what am I looking for?
Sorry if I am not clear. This is all I could express myself.