In the course of the historical development of Bulgarian the short pronominal forms (clitics) have undergone various morphological transformations and have expanded their use. As a result, they may have a different morphological status: pronouns (personal or possessive) and particles with different functions. The objective of the paper is to present the functional spectrum of pronominal clitics functioning as particles. Due to the existing homonymy, the study aims at solving two key issues. The first one is related to distinguishing the morphological status of clitics in their different uses, i.e. whether they function as pronouns or as particles. The second refers to identifying and representing the different functions of clitics as particles: wordforming, formforming, emotive, modal or intensifying.