Sentence Structure Theory in German grammar refers to the rules and principles that govern the arrangement of words and phrases in a sentence to create a meaningful and grammatically correct construction. The theory is based on the understanding that German sentences have a basic structure that follows certain patterns, although there is flexibility for variations and modifications.

In German, the basic sentence structure follows a subject-verb-object (SVO) pattern, similar to English. However, German allows for more flexibility in word order due to its case system. The position of the subject and object can be interchanged without changing the basic meaning of the sentence.

Another important aspect of German sentence structure theory is the concept of the sentence bracket. This means that sentences are often structured in a way that the main verb or predicate is positioned at the second bracket, surrounded by other sentence elements such as the subject, adverbs, and complements. This helps in maintaining a clear structure and coherence in the sentence.

Understanding and applying sentence structure theory is crucial for both comprehension and production of German sentences to create grammatically correct and meaningful communication.