The Pronouns/Determiners Theory in Serbian Grammar involves the study of words that function as substitutes for nouns or noun phrases, as well as words that determine or modify nouns.

Pronouns in Serbian can be categorized into several types: personal pronouns, possessive pronouns, demonstrative pronouns, interrogative pronouns, relative pronouns, and indefinite pronouns. These pronouns take the place of specific nouns or noun phrases in a sentence, providing clarity and conciseness to the language.

Determiners in Serbian are words that come before a noun and modify or determine its meaning. They include articles (definite and indefinite), numerals (cardinal and ordinal), possessive adjectives, and demonstrative adjectives. These determiners help specify the exact referent of a noun or provide additional information about it.

Understanding the Pronouns/Determiners Theory is crucial for learners of Serbian as it enables them to correctly substitute and modify nouns, which is essential for effective communication. Mastery of this theory allows learners to convey precise meanings and express themselves with clarity in both spoken and written Serbian.