parta

/parta/

Cases

SingularPluralWhen to use it
nominativepartathe school deskpartalathe school desksthe plain dictionary form — the doer of the sentence
genitivepartanıthe school desk'spartalanıthe school desks'the owner — whose it is
accusativepartanıthe school desk (as the object)partalanıthe school desks (as the object)a specific, known object — whom or what
dativepartağato the school deskpartalağato the school desksdirection or recipient — to where, to whom
locativepartadaat / in the school deskpartaladaat / in the school deskswhere it is; also having — mende bar, "I have it"
ablativepartadanfrom the school deskpartaladanfrom the school deskswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
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
mypartammy school deskpartalarımmy school desks
yourpartangyour school deskpartalarıngyour school desks
his / herpartasıhis / her school deskpartalarıhis / her school desks
ourpartabızour school deskpartalarıbızour school desks
you all'spartağızyou all's school deskpartalarığızyou all's school desks
theirpartalarıtheir school deskpartalarıtheir school desks

The overlap in the last rows is real, not a mistake: partaları can mean "his / her school desks", "their school desk", or "their school desks" — context decides.