The Russian Prepositional Case is used to show where the action takes place, or the topic being spoken about.
Like all cases in the Russian language, the easiest way to determine how to use the Prepositional case is to ask the key questions associated with the case. So, in other words, when you are forming the sentence, first ask yourself the questions:
(1) About whom/what are we speaking about? Or...
(2) Where is the action taking place?
The answer to these questions will tell you which nouns require the Prepositional case. When in the Prepositional case, nouns drop their 'regular' endings, and are replaced by the corresponding endings shown in the table below.
The table outlines the typical endings used, as well as the relevant endings that apply to any adjectives linked to the noun. Further, we have given some specific examples highlighting the word endings so you can see how the Prepositional case works.