Noch ein bitte Vs Noch eins bitte.
So I came across this section on the app, which translated this into the first phrase into "another one please." However, when I went around on duolingo there were some discussions where it wasn't clear which form to use for the particular example of bier, which is neutral. I understand that one would say Noch ein bier bitte, where the ein is declined from the accusative case as a neutral noun. However, some people said that if one doesn't include the noun, bier, you would say. Noch eins bitte. This eins in question does not refer to the number '1' but rather a way of declining the indefinite article when it replaces a noun. I looked this up everywhere but I didn't find a chart online that had declensions for such indefinite articles. Can somebody elaborate on this? I guess overall, are there specific declensions for indefinite articles that replace nouns, and if so, what are they?
Instead of "noch einige/mehrere", "noch welche" is often used, especially in spoken language. The connotations are:
"Es kommen noch einige." - a number of people/things will come later, e.g. some more people will arrive at the party later
"Es kommen noch mehrere." - several (more than one) people/things will come later, e.g. several cars (not just the one you've spotted) have to pass a crossroad before you're allowed to cross
"Es kommen noch welche." - this was not the last one, e.g. still unseen people coming up a narrow spiral staircase while you wait to go down
also: "Es kommen noch mehr." - more [people/things] are to come
When you ask for "some more cookies", it's best to use "welche" ("Ich möchte noch welche."), because both "einige" and "mehrere" can sound a bit greedy, stressing that it's a number of cookies you expect to be given.
If your host still has a lot of cookies left and wants to get rid of them, "Ich nehme (gerne) noch einige" ("I will (gladly) take some more") would be fine, too. "Ich nehme noch mehrere" would be uncommon, because then you're pointing out that you take not one, but several.
When you need "some more nails" for a workpiece, "Ich brauche noch einige" can imply (especially when stressed: "Ich brauche noch einige!") a higher number of nails (but can just as well be a neutral statement), "mehrere" would just mean "more than one" (so, not a lot more), and "welche" would be a neutral way to say you've run out of nails.
Ok, this makes more sense. But is there a certain grammatical rule for when the indefinite article should be switched to "eins". Also, is this the only exception to the declensions (neutral gender in the accusative case), or are there other rules/ declensions for indefinite articles I should know? Thanks so much.
Specifically, I cannot find a declension table for ein that includes a masculine form of "einer," and there isn't anything online about a declension table for indefinite articles without the related noun. Or are the three versions in the picture general and not part of a separate table?