How do you differentiate demonstrative pronoun and adjective?

Here's how to differentiate between demonstrative pronouns and adjectives:

Demonstrative Pronouns

* Stand alone: They replace nouns and act as the subject or object of a sentence.

* Examples:

* This is my favorite book. (Subject)

* I like that one. (Object)

* I want these. (Object)

* Can you see those? (Object)

Demonstrative Adjectives

* Modify nouns: They describe the noun they're next to.

* Examples:

* This book is my favorite.

* I like that hat.

* These cookies are delicious.

* Those flowers are beautiful.

In a nutshell:

* Pronouns replace nouns, while adjectives describe nouns.

* Demonstrative pronouns stand alone, while demonstrative adjectives are always followed by a noun.

Here's a simple trick:

If you can remove the word from the sentence and it still makes sense, it's likely a pronoun. If it doesn't, it's likely an adjective.

* This is my favorite book. (Makes sense without "this") - Pronoun

* This book is my favorite. (Doesn't make sense without "this") - Adjective