EN
The article aims to present some characteristics of the Spanish, French and Polish prepositional systems. The classification of prepositions is different in each language. The focus of the article is the one-word prepositions. These particles are classified here according to the grammar categories that they can also represent. This classification will show that sometimes there is a lack of unanimity in the dictionaries and the grammars about the word class to which these particles can belong. Finally, some contrasting characteristics of these three prepositional systems will be exposed.