Noun Cases in German, Nominative case, Accusative case, Dative case, Genitive case

 In German, there are four cases:

• Nominative case
• Accusative (Akkusativ) case
• Dative (Dativ) case
• Genitive case

Nominative case : it is a base form of noun. It acts as a subject of the verb. 

Rohan invited me to his birthday party. 

The noun 'Rohan' is a nominative case here

Accusative (Akkusativ) case : it is a direct object. It refers to a thing that is acted upon. 

Rohan plays guitar. 

Guitar is a direct object here and it is said to be in accusative case. 

Dative (Dativ) case : Dative case is also known as indirect object. Indirect object is the noun that receives something. 

I gave Rohan a book. 

There are two objects in this sentence ‘Rahan' and ‘a book'. 

Rohan is an Indirect object because Rohan is a person and he is receiving something. 

‘A book' is an direct object because ‘a book' is a thing and something is acted upon it. 

Genitive case : it shows belonging or possession. It is used in noun construction. There is a question also that shows genitive case like ‘whose'