German Akkusatve & Dative preposition Auf/How to learn easy German Acvusative and Dative preposition

German Akkusatve & Dative preposition Auf/How to learn easy German Acvusative and Dative preposition. How to learn Easy and fast German How to improve German Easy and Fast /Easy learning German for all How can i learn German myself Easy way of learning German How to improve German fast.