Hello and welcome to German 1. In lesson 19 we will practice all nominative and genitive forms of the indefinite article. Enjoy the video. Please note that lesson 21 is not yet on youtube. You will find the video on www.deutsch-online-lernen.com German 1 Lesson 1: "sein" - present tense. The personal pronouns Lesson 2: The grammatical gender Lesson 3: The grammatical number Lesson 4: The grammatical case Lesson 5: The definite article - forms Lesson 6: The definite article - nominative and genitive Lesson 7: The definite article - dative and accusative Lesson 8: "haben" - present tense Lesson 9: The conjugation system Lesson 10: The verb - present tense endings Lesson 11: The verb - irregular present tense Lesson 12: The singular noun - n-declension Lesson 13: The singular noun - s-declension (1) Lesson 14: The singular noun - s-declension (2) Lesson 15: The singular noun - s-declension (3) Lesson 16: The singular noun - zero declension Lesson 17: The plural noun - declension Lesson 18: The indefinite article - forms Lesson 19: The indefinite article - nominative and genitive Lesson 20: The indefinite article - dative and accusative Lesson 21: The preposition - contractions Lesson 22: The preposition - contractions zum, zur, beim, vom (already on our website!) German indefinite article - Deutsch unbestimmter Artikel