çum

/tʃum/

Cases

SingularPluralWhen to use it
nominativeçumthe cherryçumlathe cherriesthe plain dictionary form — the doer of the sentence
genitiveçumnuthe cherry'sçumlanıthe cherries'the owner — whose it is
accusativeçumnuthe cherry (as the object)çumlanıthe cherries (as the object)a specific, known object — whom or what
dativeçumğato the cherryçumlağato the cherriesdirection or recipient — to where, to whom
locativeçumdaat / in the cherryçumladaat / in the cherrieswhere it is; also having — mende bar, "I have it"
ablativeçumdanfrom the cherryçumladanfrom the cherrieswhere 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
myçumummy cherryçumlarımmy cherries
yourçumungyour cherryçumlarıngyour cherries
his / herçumuhis / her cherryçumlarıhis / her cherries
ourçumubuzour cherryçumlarıbızour cherries
you all'sçumuğuzyou all's cherryçumlarığızyou all's cherries
theirçumlarıtheir cherryçumlarıtheir cherries

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