Sentence theory, or the theory of sentence structure, is an important aspect of Hungarian grammar. In Hungarian, sentences are built around a basic word order of subject-verb-object (SVO). However, unlike in English, word order does not play a crucial role in determining the grammatical function of words in Hungarian sentences. This is because Hungarian is an inflected language, meaning that word endings change according to their grammatical role in the sentence.

In Hungarian, the subject of a sentence can appear in different positions within the sentence, and the same goes for the object. This flexibility allows for greater emphasis on certain elements of the sentence.

Sentences in Hungarian typically consist of a subject and a predicate, which can be very long and complex. The predicate contains the main verb and other elements such as objects, adverbs, and adjectives. Adverbial phrases and subordinate clauses can also be used to add additional information to the sentence.

Overall, understanding sentence theory in Hungarian grammar is essential for constructing grammatically correct and coherent sentences in the language.