art

/ art /

Cases

SingularPluralWhen to use it
nominative art the back artla the backs the plain dictionary form — the doer of the sentence
genitive artnı the back's artlanı the backs' the owner — whose it is
accusative artnı the back (as the object) artlanı the backs (as the object) a specific, known object — whom or what
dative artha to the back artlağa to the backs direction or recipient — to where, to whom
locative artda at / in the back artlada at / in the backs where it is; also having — mende bar, "I have it"
ablative artdan from the back artladan from the backs 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 artım my back artlarım my backs
your artıŋ your back artlarıŋ your backs
his / her artı his / her back artları his / her backs
our artıbız our back artlarıbız our backs
you all's artığız you all's back artlarığız you all's backs
their artları their back artları their backs

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