if kopekler is plural, shouldnt yer be yerler?
No, first -lAr is optional. Second, -lAr is normally only optionally applied when the subject is human.
So the verb is conjugated as a 3rd person singular if in third person unless it's Onlar?
Not quite. If you use the work onlar, you can optionally add the plural suffix -lAr. If you do not use onlar and you want it to be clear that they subject is they, you must add -lAr to the verb, assuming that the subject are human.
But for multiple non-people it's not necessary?
Like: Köpek ve at et yer. (Pretty sure that's dogs and horses eat meat) is correct?
I think that would be "the dog" and "the horse" eat meat.
O, interessant. Dankjewel.
So if the subject of the sentence is plural (like elmalar here) the accusative ending goes AFTER the plural? So it would never be elmayilar, for example??
first of all, elmalar are the object, not subject. but yes, plural suffix comes always before the accusative suffix
Where to use ler and where to use lar?
Seems to be related to the vowel sound that precedes it.
Check out tips and notes. The rules are there.
Why is "Dogs" instead of "The dogs" wrong?
I have the same question
I said "dogs eat apples". Does the article 'the' always have to be used twice?
Yes, apparently the subject is always expressed with a "the" (for the moment, at least) and in this case the object is marked as being specific (as no doubt you understand).
Why the pronunciation is "kopekler" instead of "kopeklar"?