biçen

/ bitʃen /

Cases

SingularPluralWhen to use it
nominative biçen the hay biçenle the hays the plain dictionary form — the doer of the sentence
genitive biçenni the hay's biçenleni the hays' the owner — whose it is
accusative biçenni the hay (as the object) biçenleni the hays (as the object) a specific, known object — whom or what
dative biçenge to the hay biçenlege to the hays direction or recipient — to where, to whom
locative biçende at / in the hay biçenlede at / in the hays where it is; also having — mende bar, "I have it"
ablative biçenden from the hay biçenleden from the hays 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 biçenim my hay biçenlerim my hays
your biçeniŋ your hay biçenleriŋ your hays
his / her biçeni his / her hay biçenleri his / her hays
our biçenibiz our hay biçenleribiz our hays
you all's biçenigiz you all's hay biçenlerigiz you all's hays
their biçenleri their hay biçenleri their hays

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