This study explores the grammatical patterns of the Maranao and English languages through a comparative analysis of their usage and structure. It aims to identify both the similarities and differences in sentence construction, verb morphology, pronoun usage, modifiers, and affixation. Using descriptivecomparative methods, data were gathered from native Maranao speakers, English grammar references, and language samples from both oral and written sources. The findings reveal distinct structural patterns in word order and focus systems in Maranao that differ from the syntactic rules of English. Additionally, variationsin verb affixation and pronoun systems highlight unique features of the Maranao language that influence second language acquisition among its native speakers. The study emphasizes the importance of understanding these grammatical distinctions for effective language learning, teaching, and translation. Ultimately, it contributes to the documentation and preservation of the Maranao language while providing insights for educators and linguists in multilingual contexts.