1. Determiners determine something about the noun(s) they modify. These are basically of six types:
Articles: "An elephant". (Here, an is acting as an indefinite article, which means we are talking about any elephant not a particular elephant).
Possessive Nouns: Ramesh's house is blue in colour". (Here, we are specifically talking about Ramesh's house not any other house).
Possessive Adjectives: My car is the best in town. (Here, my, which is a possessive adjective, is modifying the noun i.e., car).
Adjectives of Quantity: Sonu has many cars. (Here, many, which is the adjective of quantity, is modifying the noun i.e., cars).
Adjectives of Number: Fifty athletes turned up for the event. (Here, fifty, which is the adjective of number, is modifying the noun i.e., athletes).
Demonstrative Adjectives: This chicken is the best I have ever had. (Here, this, which is the demonstrative adjective, is modifying the noun i.e., chicken).
2. Articles - An article is a word that is used for indicating whether a noun is specific or non-specific. In other words, when an article is present before a noun, it shows whether that noun is some general noun or some particular noun.
There are two types of articles—the indefinite article ‘a’ or ‘an’, and the definite article ‘the’. The first type points out non-specific or general nouns and the second type points out specific or particular nouns.