An adjective an attribute of a noun/pronoun and also modify them.
Three degrees of adjectives:
  1. Positive Adjective : Used to describe a noun/pronoun.
    E.g. good.
    Usage: He is good.
  2. Comparative Adjective : Used to compare two nouns/pronouns.
    E.g. better.
    Usage: He is better than her.
  3. Superlative Adjective : Used to compare three or more nouns/pronouns.
    E.g. best.
    Usage: He is the best person in the world.
Types of Adjectives:
  1. Articles
  2. Proper Adjectives
  3. Quantitative Adjectives
  4. Possessive Adjectives
  5. Demonstrative Adjectives
  6. Coordinate Adjectives
  7. Numbers Adjectives
  8. Interrogative Adjectives
  9. Indefinite Adjectives
  10. Attributive Adjectives
  11. Compound Adjectives

1. Articles
Articles also modify the nouns/pronouns and also specification of nouns.
E.g. A dog is the most faithful animal.
E.g. An apple is a sweet fruit.
E.g. The dog has mud on it.
2. Proper Adjectives
Proper adjectives are the adjective form of proper nouns. Due to the proper nouns modification of other nouns/pronouns proper adjectives will form.
E.g. Indians people are intelligent.
E.g. I like horror movies.
3. Quantitative Adjectives
A Quantitative adjectives gives the information of quantity of the nouns/pronouns.
E.g. I have six cars.
E.g. He completed the whole task.
4. Possessive Adjectives
A Possessive adjective used to indicate the possession.
E.g. my, your, his, her, its, our, their.
5. Demonstrative Adjectives
A Demonstrative adjective used to indicate or demonstrate nouns.
E.g. this, these, those.
Demonstrative adjective : This movie is awesome.
Demonstrative pronoun : This is an awesome movie.
6. Coordinate Adjectives
Coordinate adjectives are separated with commas (and) and.
E.g. He is an innocent, decent and intelligent person.
7. Numbers Adjectives
When numbers are used in a sentence as an answer to a question.
E.g. He ate 20 apples.
8. Interrogative Adjectives
Interrogative adjectives modify nouns.
E.g. what, which, whose.
Usage: which movie is your favorite one?
9. Indefinite Adjectives
An indefinite adjectives are refer to non-specific things.
E.g. any, many, no, several, few.
Usage: Do you have any pen?
10. Attribute Adjectives
An attribute adjectives refer to specific attributes/traits/qualities/features of a noun.
E.g. red, green, blue. (based on color)
E.g. good, beautiful, interesting. (based on observation)
E.g. young, old, new. (based on age)
E.g. small, big, poor, healthy. (based on measurement)
11. Compound Adjectives
A Compound adjective is the for of two or more adjectives together in a sentence.
E.g. Ajay is well-educated person.
E.g. He is a part-time worker.