Can someone explain Croatian Cases

[unitedpilot]

I am having a hard time grasping Croatian Cases.
Can someone give me a clear definition with some examples for each?

[vijayjohn]

I don't know, but I'll try anyway:

Nominative - subject of a sentence, who is doing something:

Ja vidim psa (ja is in nominative case).
I see a dog.

Accusative - direct object of a sentence, who something is done to:

Imam knjigu (knjigu is in accusative case).
I have a book.

Dative - indirect object of a sentence, often corresponds to the prepositions to and for in English:

Šaljem knjigu mojem prijatelju (mojem prijatelju is in dative case).
I'm sending a book to my friend.

Genitive - the possessor of something, often corresponds to of or 's in English, also used with some prepositions like iz or od 'from':

cipele djevojke (djevojke is in genitive case)
a/the girl's shoes

iz Rusije (Rusija is in genitive case because of iz 'from')
from Russia

Locative - where something is located, often used with prepositions like u or na meaning 'in, on, at':

u rječniku (rječniku is in locative case because of u, here meaning 'in')
in the dictionary

Instrumental - what someone uses (to do something), often corresponds to with or by in English, also used with some prepositions like sa 'with':

Potpisao sam perom ([i]perom is in instrumental case).
I signed with a pen/in pen.