The given article dwells on the issue beset with sentence structure and its peculiarities in English. It is noted that a sentence is formed on the basis of the semantic and syntactic integration of two related members: the subject and the predicate. These two components are considered the basis of the construction of a sentence, and in grammar they are called the predicative group. These two members of the sentence represent the syntactic category of predicativity. Predicativity consists of three elements, which express the relationship of the content of speech to person, tense, and modality. These three elements of predicativity together ensure the existence of a sentence.