teoriya

/teorija/

Cases

SingularPluralWhen to use it
nominativeteoriyathe theoryteoriyalathe theoriesthe plain dictionary form — the doer of the sentence
genitiveteoriyanıthe theory'steoriyalanıthe theories'the owner — whose it is
accusativeteoriyanıthe theory (as the object)teoriyalanıthe theories (as the object)a specific, known object — whom or what
dativeteoriyağato the theoryteoriyalağato the theoriesdirection or recipient — to where, to whom
locativeteoriyadaat / in the theoryteoriyaladaat / in the theorieswhere it is; also having — mende bar, "I have it"
ablativeteoriyadanfrom the theoryteoriyaladanfrom the theorieswhere 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
myteoriyammy theoryteoriyalarımmy theories
yourteoriyangyour theoryteoriyalarıngyour theories
his / herteoriyasıhis / her theoryteoriyalarıhis / her theories
ourteoriyabızour theoryteoriyalarıbızour theories
you all'steoriyağızyou all's theoryteoriyalarığızyou all's theories
theirteoriyalarıtheir theoryteoriyalarıtheir theories

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