tay

/ taj /

Cases

SingularPluralWhen to use it
nominative tay the foal tayla the foals the plain dictionary form — the doer of the sentence
genitive taynı the foal's taylanı the foals' the owner — whose it is
accusative taynı the foal (as the object) taylanı the foals (as the object) a specific, known object — whom or what
dative tayğa to the foal taylağa to the foals direction or recipient — to where, to whom
locative tayda at / in the foal taylada at / in the foals where it is; also having — mende bar, "I have it"
ablative taydan from the foal tayladan from the foals where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
my tayım my foal taylarım my foals
your tayıŋ your foal taylarıŋ your foals
his / her tayı his / her foal tayları his / her foals
our tayıbız our foal taylarıbız our foals
you all's tayığız you all's foal taylarığız you all's foals
their tayları their foal tayları their foals

The overlap in the last rows is real, not a mistake: tayları can mean "his / her foals", "their foal", or "their foals" — context decides.