Polish/Genitive case

The Genitive case in Polish language is used in the following situations:
 * 1) Indicates the object of a sentence.
 * 2) * Szukam mojego psa. - I am looking for my dog. (mojego psa is in genitive because it is the object of the sentence)
 * 3) Used after certain prepositions such as do, od, bez, dla, z, o, na, po, ku, przy.
 * 4) * Idę do szkoły. - I am going to school. (szkoły is in the genitive)
 * 5) * Kupiłem prezent dla mamy. - I bought a gift for mom. (mamy is in the genitive)
 * 6) Used to express possession.
 * 7) * To jest książka mojego brata. - This is my brother's book. (mojego brata is in the genitive)
 * 8) Used to indicate partitive meaning (some, a bit of).
 * 9) * Chcę trochę wody. - I want some water. (wody is in the genitive)

The genitive answers the questions whose? (czyj?), of whom? (kogo?) and of what? (czego?).