A helpful video on YouTube with a basic introduction to the cases of Russian nouns. This is just one video lessons created by Максим Ачкасов on Russian as a Foreign Language. This video is only an introduction, and he goes into more detail in other videos. The Russian grammar page at Wikipedia has a lot of information in general. Nominal declension is subject to six cases – nominative , genitive , dative , accusative , instrumental , and prepositional – in two numbers ( singular and plural ), and absolutely obeying grammatical gender (masculine, feminine, and neuter).
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