In Russian language the nouns change their forms and get different endings. These forms (and their endings) are called cases. The case of a noun shows what role a noun plays in the sentence.Please note that the goal of this lesson is to introduce the cases of Russian nouns. If you'd like to study cases in more detail, please read our lessons dedicated to each of the six cases in Russian.Now, let's look at an example of how the word поездchanges depending on the case. The stressed vowels are underlined:много поездов(a lot of trains) - the genitiveехать поездом(to go by train) - the instrumentalThere are six cases in Russian: nominative, genitive, dative, accusative, instrumental,and prepositional.1.The nominative caseanswers the questions "who?" or "what?". It is an initial form. All dictionaries give nouns in the nominative.СтудентчитаетThe studentis reading.