What is grammar primarily concerned with?

Grammar is primarily concerned with the rules for constructing sentences. It encompasses the structure of language, focusing on how words fit together to form phrases, clauses, and complete sentences. This includes understanding parts of speech (like nouns, verbs, and adjectives), sentence structures, and the relationships between words within a sentence. Proper grammar ensures that ideas are communicated clearly and effectively, which is essential in both spoken and written communication.

The other options relate to different aspects of language but do not define grammar itself. The sounds of language pertain more to phonetics and phonology, while vocabulary is connected to lexicon and semantics, focusing on the meaning and use of words. The speed at which someone speaks relates to fluency and delivery, rather than the underlying rules for sentence construction that grammar defines.