Types of Adjectives:

1. Descriptive Adjectives:
Descriptive adjectives are used to describe or provide more information about a noun. They give details about the size, shape, color, age, origin, and material of the noun. These adjectives help to create a clearer picture in the reader's mind. For example, "big," "round," "red," "old," "Chinese," and "wooden" are descriptive adjectives.

2. Quantitative Adjectives:
Quantitative adjectives are used to describe the quantity or number of a noun. They answer the question "how much" or "how many." Examples include "many," "few," "some," "several," and "all."

3. Demonstrative Adjectives:
Demonstrative adjectives are used to point out or indicate a specific noun. They indicate whether the noun is near or far in distance or time. Examples of demonstrative adjectives are "this," "that," "these," and "those."

4. Possessive Adjectives:
Possessive adjectives show ownership or possession. They are used to indicate that something belongs to someone or something. Examples include "my," "your," "his," "her," "our," and "their."

5. Interrogative Adjectives:
Interrogative adjectives are used to ask questions about a noun. They are usually used at the beginning of a sentence. Examples of interrogative adjectives are "which," "what," and "whose."

6. Indefinite Adjectives:
Indefinite adjectives are used to give a general or non-specific description of a noun. They do not indicate a specific number or quantity. Examples include "some," "any," "each," "several," and "many."

7. Comparative and Superlative Adjectives:
Comparative adjectives are used to compare two nouns, while superlative adjectives are used to compare more than two nouns. They indicate a higher or lower degree of a quality. Examples of comparative adjectives are "bigger," "smaller," "more beautiful," and "less intelligent." Superlative adjectives include "biggest," "smallest," "most beautiful," and "least intelligent."

Usage in English Grammar:
Adjectives are an important part of English grammar as they help to add more detail, specificity, and vividness to our writing and speech. They modify nouns and pronouns, making our language more descriptive and expressive. By using different types of adjectives, we can paint a clearer picture, convey emotions, and convey ownership or possession. Adjectives also play a crucial role in comparative and superlative forms, allowing us to compare and rank things. Understanding the various types of adjectives and their usage helps to enhance our communication skills and create more engaging and effective writing.