An adjective clause is a group of words that work together to describe a noun. It also can be defined as a dependent clause that modifies a noun or pronoun. Just like a regular adjective, it tells us more about the noun. 

For example: “This is the book that I bought yesterday.”

Key Fitures of Adjective Clause:

• Starts with relative pronouns: who, whom, whose, which, that

• Describes a noun (person, place, thing)

• Can’t stand alone!

The Relative Pronoun include:

• who (for people, subject)

• whom (for people, object)

• which (for things)

• that (for people or things)

• whose (to show possession)

Let’s look at some more examples:

• “The girl who won the race is my best friend.”

• “I know a place where we can get great coffee.”

• “This is the movie that I told you about.”

• "The student whom the principal praised was very happy."

• "The movie which we watched last night was amazing."

• "The girl whose bike was stolen reported it to the police."