The document discusses the structure and components of grammar. It explains that grammar has two main parts: syntax, which deals with sentence structure, and morphology, which deals with grammatical word classes. It defines the basic means of grammatical structure as sentence structure and grammatical word classes. Grammatical word classes are divided into notional parts of speech, such as nouns and verbs, and functional parts of speech, such as articles and prepositions. Five signals of syntactic structure are also outlined: word order, prosody, function words, inflections, and derivational contrast.