Parts of speech are the fundamental building blocks of language that help us understand how words function in a sentence. There are eight main parts of speech: 1. Noun: A noun is a word that names a person, place, thing, or idea. For example, "cat," "London," and "happiness" are all nouns. 2. Pronoun: A pronoun is a word that replaces a noun to avoid repetition. Examples include "he," "she," "it," and "they." 3. Verb: A verb is a word that expresses an action, state, or occurrence. It tells what the subject of the sentence does or is. Examples of verbs are "run," "eat," and "think." 4. Adjective: An adjective is a word that describes or modifies a noun or pronoun. It gives more information about the noun or pronoun. For instance, "blue," "tall," and "delicious" are adjectives. 5. Adverb: An adverb is a word that modifies a verb, adjective, or another adverb. It provides information about how, when, where, or to what extent something happens. Examples are "quickly," "very," and "often." 6. Preposition: A preposition is a word that shows the relationship between a noun (or pronoun) and other words in the sentence. It indicates location, time, direction, or other spatial relationships. Common prepositions include "in," "on," "under," and "after." 7. Conjunction: A conjunction is a word that connects words, phrases, or clauses in a sentence. Some common conjunctions are "and," "but," "or," and "because." 8. Interjection: An interjection is a word or phrase used to express strong feelings or emotions. It stands alone and is not grammatically connected to the rest of the sentence. Examples include "wow," "ouch," and "bravo." Understanding the different parts of speech is essential for constructing grammatically correct and coherent sentences. By identifying the role of each word, we can communicate more effectively and clearly.