Indefinite adverbs in Bulgarian grammar are adverbs that express an approximate or uncertain quantity, degree, or frequency. They are used to describe actions, events, or situations without specifying the exact amount or frequency. Common indefinite adverbs in Bulgarian include “няколко” (some), “някога” (ever), “понякога” (sometimes), and “редом” (around). These adverbs are essential for creating more natural and idiomatic expressions in the Bulgarian language. In this exercise, you will practice using indefinite adverbs in Bulgarian sentences by filling in the blanks with the correct word.