The document discusses the levels of linguistic analysis and syntactic categories. It explains that syntax examines how words are combined to form sentences based on grammatical rules. There are two main types of syntactic categories - lexical categories like nouns, verbs, adjectives which have inherent meaning, and functional categories like determiners and auxiliaries which have grammatical functions. The document provides details on the morphological and syntactic properties of nouns, verbs, adjectives, adverbs, determiners and auxiliaries.