zadanie

/zadanie/

Cases

SingularPluralWhen to use it
nominativezadaniethe taskzadanielethe tasksthe plain dictionary form — the doer of the sentence
genitivezadanienithe task'szadanielenithe tasks'the owner — whose it is
accusativezadanienithe task (as the object)zadanielenithe tasks (as the object)a specific, known object — whom or what
dativezadaniegeto the taskzadanielegeto the tasksdirection or recipient — to where, to whom
locativezadaniedeat / in the taskzadanieledeat / in the taskswhere it is; also having — mende bar, "I have it"
ablativezadaniedenfrom the taskzadanieledenfrom the taskswhere 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
myzadaniemmy taskzadanielerimmy tasks
yourzadaniengyour taskzadanieleringyour tasks
his / herzadaniesihis / her taskzadanielerihis / her tasks
ourzadaniebizour taskzadanieleribizour tasks
you all'szadaniegizyou all's taskzadanielerigizyou all's tasks
theirzadanieleritheir taskzadanieleritheir tasks

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