qayın

/qajɯn/

Cases

SingularPluralWhen to use it
nominativeqayınthe birchqayınlathe birchesthe plain dictionary form — the doer of the sentence
genitiveqayınnıthe birch'sqayınlanıthe birches'the owner — whose it is
accusativeqayınnıthe birch (as the object)qayınlanıthe birches (as the object)a specific, known object — whom or what
dativeqayıngato the birchqayınlağato the birchesdirection or recipient — to where, to whom
locativeqayındaat / in the birchqayınladaat / in the bircheswhere it is; also having — mende bar, "I have it"
ablativeqayındanfrom the birchqayınladanfrom the bircheswhere 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
myqayınımmy birchqayınlarımmy birches
yourqayınıngyour birchqayınlarıngyour birches
his / herqayınıhis / her birchqayınlarıhis / her birches
ourqayınıbızour birchqayınlarıbızour birches
you all'sqayınığızyou all's birchqayınlarığızyou all's birches
theirqayınlarıtheir birchqayınlarıtheir birches

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