qalam

/ qalam /

Cases

SingularPluralWhen to use it
nominative qalam the pen qalamla the pens the plain dictionary form — the doer of the sentence
genitive qalamnı the pen's qalamlanı the pens' the owner — whose it is
accusative qalamnı the pen (as the object) qalamlanı the pens (as the object) a specific, known object — whom or what
dative qalamğa to the pen qalamlağa to the pens direction or recipient — to where, to whom
locative qalamda at / in the pen qalamlada at / in the pens where it is; also having — mende bar, "I have it"
ablative qalamdan from the pen qalamladan from the pens 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
my qalamım my pen qalamlarım my pens
your qalamıŋ your pen qalamlarıŋ your pens
his / her qalamı his / her pen qalamları his / her pens
our qalamıbız our pen qalamlarıbız our pens
you all's qalamığız you all's pen qalamlarığız you all's pens
their qalamları their pen qalamları their pens

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