çay

/ tʃaj /

Cases

SingularPluralWhen to use it
nominative çay the tea çayla the tea the plain dictionary form — the doer of the sentence
genitive çaynı the tea's çaylanı the tea's the owner — whose it is
accusative çaynı the tea (as the object) çaylanı the tea (as the object) a specific, known object — whom or what
dative çayğa to the tea çaylağa to the tea direction or recipient — to where, to whom
locative çayda at / in the tea çaylada at / in the tea where it is; also having — mende bar, "I have it"
ablative çaydan from the tea çayladan from the tea 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 çayım my tea çaylarım my tea
your çayıng your tea çaylarıng your tea
his / her çayı his / her tea çayları his / her tea
our çayıbız our tea çaylarıbız our tea
you all's çayığız you all's tea çaylarığız you all's tea
their çayları their tea çayları their tea

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