bank

/bank/

Cases

SingularPluralWhen to use it
nominativebankthe bankbanklathe banksthe plain dictionary form — the doer of the sentence
genitivebanknıthe bank'sbanklanıthe banks'the owner — whose it is
accusativebanknıthe bank (as the object)banklanıthe banks (as the object)a specific, known object — whom or what
dativebankhato the bankbanklağato the banksdirection or recipient — to where, to whom
locativebankdaat / in the bankbankladaat / in the bankswhere it is; also having — mende bar, "I have it"
ablativebankdanfrom the bankbankladanfrom the bankswhere 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
mybankımmy bankbanklarımmy banks
yourbankıngyour bankbanklarıngyour banks
his / herbankıhis / her bankbanklarıhis / her banks
ourbankıbızour bankbanklarıbızour banks
you all'sbankığızyou all's bankbanklarığızyou all's banks
theirbanklarıtheir bankbanklarıtheir banks

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