Language/German/Grammar/Cases

There are four cases in German: nominative, accusative, dative, genitive.

• Nominative indicates the subject of a verb, such as "the monkey" in "The monkey eats a banana."
• Accusative indicates the direct object of a transitive verb, such as "a pen" in "He bought a pen".
• Dative indicates the noun which receive something if it's not a subject, such as "him" in "His father will give him a tricycle".
• Genitive usually indicates the possesor of a thing, such as "my mom" in "This is a helicopter of my mom".

This lesson means to keep brief. It only covers the main usage, to make people understand quickly.