The purpose of this first comprehensive and systematic description of the syntax of the Apocalypse is basic and practical: to understand the language. It is the initial step in a project to describe the syntax of the various books in the NT. With a computer, syntactical phenomena are arranged as in traditional grammars, and described with every instance noted. The history of individual phenomena and their comparison with similar usages within the Apocalypse and in other stages of Greek and with usages in Hebrew and Aramaic are given where significant. Word order is described. Compound sentences are frequent; complex sentences rare. Expressed subjects, normally nominative nouns, are indicated also by other words, chiefly pronouns and adjectives. Referents of unexpressed subjects are clear from verbal endings and/or contexts. Subjects are sometimes indefinite. Predicates are most often verbs. Verbs sometimes link other predicates, the nonverbal predicates being nominative nouns and adjectives, sometimes adverbs and prepositional phrases. Twenty nonverbal clauses are existential. Others have the same predicates as copulas do. The few verbal disagreements involve compound and neuter plural subjects, and collective terms. The few adjectival disagreements involve personification and assimilation. Cases indicate subject and predicate, adnominal modifier, indirect object, direct object, and addressee. Adverbial uses of the genitive and dative normally involve prepositions. Frequent adnominal genitives immediately follow their noun; dative indirect objects, their verb. Accusative objects follow the verb. Subject and direct object both occurring, subjects more often precede the verb, objects follow. Articles are deictic markers of specificity, not of genus or subject. Frequent personal pronouns replace rare reflexive and demonstrative pronouns except usdo \upsilon\tau o\varsigmausd. Relative pronouns usd\acute o\varsigmausd and usd\acute o\sigma\tau\iota\varsigmausd are interchangeable. Other pronouns are rare. Adjectives are infrequent. Anarthrous adjectives follow modified nouns; arthrous adjectives, in the second attributive position. Prepositions replace case functions; improper prepositions with the genitive replace proper prepositions. Aspect is more important than time. The perfect exists effectively only in the participle. The future indicative and aorist subjunctive are interchangeable. Adverbs, particles, and conjunctions are infrequent. Kusd\alpha\acute\iotausd begins almost every clause.