Word order typology examines how syntactic constituents are arranged within a language, highlighting cross-linguistic variations. This study focuses on the positioning of subjects, verbs, and objects, as well as modifiers in noun phrases, including adjectives, demonstratives, possessives, numerals, adjuncts, and adverbials. In some languages, word order conveys essential syntactic relationships, whereas in inflectional languages, greater flexibility allows it to encode pragmatic information. Despite these differences, most languages exhibit preferred or dominant orders. Based on the sequence of core constituents, word order is generally classified into six categories: SVO, SOV, OSV, OVS, VSO, and VOS. Chinese, English, and Russian follow the SVO pattern. Word order also plays a crucial role in information structure, governing how given and new information is organized. In fixed-order languages like English and Chinese, syntactic positioning signals information structure, though Chinese shows some flexibility in discourse, whereas English remains largely rigid. Inflectional languages like Russian rely on morphological markers, allowing greater variation. This study conducts a comparative analysis of Chinese, English, and Russian, examining word order variations and their grammatical and pragmatic functions. Using examples from linguistic research and grammar descriptions, it explores both canonical and non-canonical orders and how languages differ in handling subjects, objects, adverbials, and modifiers. Special attention is given to the interaction between word order and information structure, including topic, focus, and discourse context, as well as structural factors like case marking, morphological constraints, and typological tendencies. Framed through functional, generative, cognitive, and information-theoretic perspectives, the analysis identifies universal patterns and language-specific strategies, offering insights into the interplay of grammar, discourse, and cognitive processing. By integrating cross-linguistic and theoretical perspectives, this study contributes to a comprehensive understanding of sentence structure in Chinese, English, and Russian and provides implications for language learning, translation, and natural language processing (NLP).