opera

/opera/

Cases

SingularPluralWhen to use it
nominativeoperathe operaoperalathe operasthe plain dictionary form — the doer of the sentence
genitiveoperanıthe opera'soperalanıthe operas'the owner — whose it is
accusativeoperanıthe opera (as the object)operalanıthe operas (as the object)a specific, known object — whom or what
dativeoperağato the operaoperalağato the operasdirection or recipient — to where, to whom
locativeoperadaat / in the operaoperaladaat / in the operaswhere it is; also having — mende bar, "I have it"
ablativeoperadanfrom the operaoperaladanfrom the operaswhere 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
myoperammy operaoperalarımmy operas
youroperangyour operaoperalarıngyour operas
his / heroperasıhis / her operaoperalarıhis / her operas
ouroperabızour operaoperalarıbızour operas
you all'soperağızyou all's operaoperalarığızyou all's operas
theiroperalarıtheir operaoperalarıtheir operas

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