I've learned that parts of speech are fundamental building blocks of sentences, each serving a specific function to convey meaning and structure. Nouns identify people, places, things, or ideas, while verbs express actions or states of being. Adjectives modify nouns, providing more detail, and adverbs enhance verbs, adjectives, or other adverbs by indicating manner, time, frequency, or degree. Conjunctions connect words, phrases, or clauses, helping to create coherent and complex sentences. Prepositions establish relationships between nouns and other words, and pronouns replace nouns to avoid repetition. Understanding these parts of speech and their roles helps in constructing clear, effective sentences and enhances overall communication.