prospekt

/prospekt/

Cases

SingularPluralWhen to use it
nominativeprospektthe avenueprospektlethe avenuesthe plain dictionary form — the doer of the sentence
genitiveprospektnithe avenue'sprospektlenithe avenues'the owner — whose it is
accusativeprospektnithe avenue (as the object)prospektlenithe avenues (as the object)a specific, known object — whom or what
dativeprospektgeto the avenueprospektlegeto the avenuesdirection or recipient — to where, to whom
locativeprospektdeat / in the avenueprospektledeat / in the avenueswhere it is; also having — mende bar, "I have it"
ablativeprospektdenfrom the avenueprospektledenfrom the avenueswhere 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
myprospektimmy avenueprospektlerimmy avenues
yourprospektingyour avenueprospektleringyour avenues
his / herprospektihis / her avenueprospektlerihis / her avenues
ourprospektibizour avenueprospektleribizour avenues
you all'sprospektigizyou all's avenueprospektlerigizyou all's avenues
theirprospektleritheir avenueprospektleritheir avenues

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