Combined Disyllabic Words refer to words those are used in pairs and their specific combination words are also used in pairs. They are certain directional formal stylistic words and are mostly found in verbs, adjectives, adverbs and nouns. Among them, verbal combined words are used as predicates and adverbials, adjectival combined words are used as adverbials and predicates, adverbs are only used as adverbials. Nominal combined words are used as adverbials and objects in pairs. They have the same important means of "written formal stylistic functions" grammatical structures.