What is the Russian Case System?

The Russian language has 6 cases: Nominative, Genitive, Dative, Accusative, Instrumental and Prepositional. The cases are a grammatical category of nouns, pronouns, adjectives, numerals, and participles. Cases are represented by a set of endings which are attached to these parts of speech. The factors that determine the use of specific cases are very contextual and may depend on prepositions or numerals used before the modified word, members of the sentence (Subject, Object), expression of possession, expression of location or direction of movement (motion verbs) and other factors.

Is it true that some languages are easier to learn than others?

The idea of a language being easy or difficult to learn derives solely from people's subjective experiences and, thus, the degree of complexity for a language learner can vary depending on multiple factors, such as the number of languages they speak, what language families they belong to, whether one is using the best suitable language learning methods, etc.

In what situations can one use the Present Continuous Tense in English?

The Present Continuous Tense is used to describe a continuous process or action that is currently taking place. For example: I am writing a letter right now. However, this tense can also be used to refer to future plans or intentions. For example: I'm flying to London next week.