The German nominative case
The nominative case shows the subject of a sentence—the person or thing doing the action. German nouns have three possible genders: masculine (der), feminine (die), or neutral (das). The plural of any gender in the nominative case is always die. Other articles used are ein, eine, and ein. In German, all words that are nouns have a gender.
The nominative and verbsThe nominative is always used after some verbs, such as sein—to be, bleiben—to stay, werden—to be or to become, scheinen—to appear, and heißen—to be called.
Es ist ein schönes Wochenende.
It is a lovely weekend.
Es wird eine kleine Versammlung.
It will be a small gathering.
The vocativeThe nominative case is also used in situations where a person is being addressed.
Sehr geehrte Damen und Herren
Dear Sir or Madam