In English grammar, the concept of "parts of speech" refers to the various categories into which words can be classified based on their grammatical and syntactical functions within sentences. Understanding parts of speech is essential for constructing grammatically correct sentences and effectively conveying meaning. There are eight primary parts of speech in English:

Noun: a word that represents a person, place, thing, or idea. They can be classified into different types, such as common... (e.g., dog, city), proper... (e.g., John, Paris), concrete... (e.g., table, car), and abstract... (e.g., love, happiness).

Pronouns: a word that are used in place of nouns to avoid repetition. They refer to people, places, things, or ideas indirectly. Examples include he, she, it, they, we, me, him, her, us, and them.

Adjective←a word that modifies or describes nouns or pronouns, providing more information about their attributes or qualities. It can be used to indicate size, color, shape, or other characteristics. Examples include "tall", "blue", "round", and "delicious" (See Determiners below.).

Determiner←similar to an adjective, this type precedes nouns and provides more information about the nouns they modify. They help to clarify which specific noun is being referred to, indicate quantity, possession, or definiteness, and offer additional context to the sentence. They play a crucial role in specifying and modifying nouns in sentences and are an essential part of constructing grammatically correct and meaningful sentences in English. They work in conjunction with nouns to provide the necessary context, specificity, and additional information required to convey the intended message effectively. Here are some common types and their explanations:

Article

**Definite ("the")**←is used before a noun when the speaker and the listener both know exactly which thing or things are being referred to. For example, "The cat is on the roof."

**Indefinite ("a" and "an")**←are used before singular nouns when the noun is not specific or known to the listener. "A" is used before words that start with consonant sounds, while "an" is used before words that start with vowel sounds. For example, "I saw a dog" or "She has an umbrella."

Demonstrative←indicates the proximity or distance of a noun in relation to the speaker: this, that, these, and those. For instance, "This book is interesting," or "Those flowers are beautiful."

Possessive←shows ownership or possession of a noun. Common examples include "my," "your," "his," "her," "its," "our," and "their." For example, "Her car is red," or "Our house is big."

Quantifier←provides information about the quantity or amount of the noun. They can be specific (e.g., "two," "many," "few") or non-specific (e.g., "some," "several," "all"). For instance, "I have some apples," or "She took all the cookies."

Number←directly precede a noun to indicate quantity. Examples include "five books," "three cats," and "ten students."

Interrogative←used in questions to ask about nouns. The main example is "which." For example, "Which movie do you want to watch?"

Exclamative←used to express strong emotions or exclamations about a noun. The main example is "what." For instance, "What a beautiful sunset!"

Verb←a word that express actions, occurrences, or states of being. They are central to forming sentences and can be categorized into various types, such as actions (e.g., run, eat), linking... (e.g., is, seem), and helping or auxiliary... (e.g., will, have).

Adverb←modifies verbs, adjectives, or other adverbs, often providing information about how, when, where, or to what extent an action is performed. Adverbs help add detail to sentences. Examples include quickly, very, here, and often.

Preposition←establishes relationships between nouns or pronouns and other words in a sentence. They usually indicate location, direction, time, or manner. Common examples include "in", "on", "under", "by", "with", and "between".

Conjunction←used to connect words, phrases, or clauses within a sentence. They help establish relationships between different elements and show how they relate to each other. Examples include "and", "but", "or", "so", and "because".

Interjection←is an exclamatory word or phrase used to express strong emotions or sudden reactions. They are often set apart from the rest of the sentence with punctuation, such as an exclamation mark. Examples include "wow", "oh", and "hooray".

It's important to note that some words can function as different parts of speech depending on their context within a sentence. For example, the word "run" can be a noun ("I went for a run"), a verb ("She likes to run"), or an adjective ("He participated in the run").