ruçka

/rutʃka/

Cases

SingularPluralWhen to use it
nominativeruçkathe penruçkalathe pensthe plain dictionary form — the doer of the sentence
genitiveruçkanıthe pen'sruçkalanıthe pens'the owner — whose it is
accusativeruçkanıthe pen (as the object)ruçkalanıthe pens (as the object)a specific, known object — whom or what
dativeruçkağato the penruçkalağato the pensdirection or recipient — to where, to whom
locativeruçkadaat / in the penruçkaladaat / in the penswhere it is; also having — mende bar, "I have it"
ablativeruçkadanfrom the penruçkaladanfrom the penswhere 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
myruçkammy penruçkalarımmy pens
yourruçkangyour penruçkalarıngyour pens
his / herruçkasıhis / her penruçkalarıhis / her pens
ourruçkabızour penruçkalarıbızour pens
you all'sruçkağızyou all's penruçkalarığızyou all's pens
theirruçkalarıtheir penruçkalarıtheir pens

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