This document discusses morphology and phonology and their importance in language instruction. It defines morphology as the study of how morphemes combine to form words. Morphemes are the smallest meaningful units of language. Teaching morphemes can help students learn more vocabulary. Phonology is defined as the study of speech sound patterns. Understanding phonology allows students to distinguish sounds in their native language from foreign sounds and to learn pronunciation rules. The document argues that learning morphology and phonology can improve students' written and verbal communication skills.