Prepositions, a fundamental part of Bulgarian grammar, play a crucial role in expressing relationships between words in a sentence. They serve to convey various aspects of time, place, direction, manner, cause, and purpose.

Bulgarian prepositions can be divided into three main categories: simple prepositions, compound prepositions, and postpositions. Simple prepositions, such as в (in), на (on), and до (to), are used independently and precede the noun they modify. Compound prepositions, such as във (in), извън (outside), and над (above), consist of a basic preposition combined with a particle or adverb, and are used to express more specific relationships. Postpositions, such as между (between) and върху (on top of), are used after the noun they modify.

It is important for learners to understand the correct usage of prepositions in order to convey their intended meaning. As with any language, memorization of prepositions and their associated meanings is a key aspect of comprehension and communication. Additionally, exposure to authentic materials and practice through exercises and conversation can greatly improve proficiency in using prepositions correctly.