post

/post/

Cases

SingularPluralWhen to use it
nominativepostthe postpostlathe poststhe plain dictionary form — the doer of the sentence
genitivepostnuthe post'spostlanıthe posts'the owner — whose it is
accusativepostnuthe post (as the object)postlanıthe posts (as the object)a specific, known object — whom or what
dativeposthato the postpostlağato the postsdirection or recipient — to where, to whom
locativepostdaat / in the postpostladaat / in the postswhere it is; also having — mende bar, "I have it"
ablativepostdanfrom the postpostladanfrom the postswhere 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
mypostummy postpostlarımmy posts
yourpostungyour postpostlarıngyour posts
his / herpostuhis / her postpostlarıhis / her posts
ourpostubuzour postpostlarıbızour posts
you all'spostuğuzyou all's postpostlarığızyou all's posts
theirpostlarıtheir postpostlarıtheir posts

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