The article aims to study the problem of the peculiarities of the communicative
functions of interrogative sentences. The relevance of the problem is connected
with the rich pragmatic fullness of these linguistic units. The issue of
communicative functions of interrogative sentences was considered from the
theory of speech acts, in which they are realized. Thus, examples of interrogatives
were analyzed in representative, directive, commission, and expressive speech
acts based on dialogues from the sitcom “Big Bang Theory”. Determining the
quantitative ratio of interrogatives in the composition of different types of speech
acts and comparing these statistics with the results of another study allowed
the authors to decide the most productive types. The prospect of further research
is a more in-depth study of the pragmatics of interrogative sentences, as well as
interdisciplinary research.