Questions & Answers about Я покупаю газету в киоске.
Why is it газету instead of the dictionary form газета?
Because the newspaper is the direct object of the sentence, meaning it is the thing being bought. In Russian, feminine words ending in -а change to -у when an action is being done to them. This is known as the accusative case.
Why does the word киоск have an -е added to the end?
When you talk about a location where something happens, Russian uses the prepositional case. For most masculine nouns like киоск, you show this by adding an -е to the end, giving us в киоске.
Why do we use the preposition в instead of на for "at the kiosk"?
Even though we say "at" in English, Russian treats a kiosk as an enclosed structure or physical building. Therefore, we use в (in) to indicate being at that physical space, rather than на which is used for flat surfaces or events.
Does покупаю mean "buy" or "am buying"?
It means both! Russian does not have a separate tense for "I buy" generally and "I am buying" right now. The verb покупаю covers both meanings, and you rely on context to tell them apart.