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A sentence is a fundamental unit of language that expresses a complete thought. It typically begins with a capital letter and ends with punctuation like a period, question mark, or exclamation point. Sentences can be classified by their structure: simple (one clause), compound (two or more coordinate clauses), or complex (one or more main clauses and one or more subordinate clauses).12

In English grammar, words are categorized into parts of speech based on their function within a sentence, such as nouns, verbs, adjectives, and adverbs. These parts of speech work together to form coherent sentences that convey meaning.3

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