1. Explanation and Practice
Adjective Clauses
Explanation and Practice

2. What is an Adjective?
An Adjective describes a noun. Remember nouns can either be subjects, objects or objects of prepositions.
Which words are adjectives?
unkind
fast
value
careless
silently
old
Which words are adjectives?
unkind
fast
value
careless
silently
old

3. What is an Adjective Clause?
An Adjective clause is a dependent clause (dependent word + subject and verb) that describes a noun.
You can imagine that an adjective clause is taking two sentences about the same noun and making them into one sentence.
Examples:
The postcard shows a beautiful vista of the Grecian coastline.
I bought the postcard.
The postcard which I bought shows a beautiful vista of the Grecian coastline.
Examples:
Route 66 is a long road.
This road goes from Chicago to California.
Route 66 is a long road that goes from Chicago to California.

4. Subject Relative Pronouns
We use relative pronouns to create dependent clauses.
The relative pronoun replaces the word in common between the two sentences.
Sometimes, the relative pronoun will be the subject of the dependent clause.
Examples:
Route 66 is a long road.
This road goes from Chicago to California.
Route 66 is a long road that goes from Chicago to California.
Subject Relative Pronouns
People: Who or That
Things or Animals: Which or That
Possessive: Whose

5. Object Relative Pronouns
Sometimes, the relative pronoun will replace the object in the dependent clause or the object of a preposition.
To connect this type of clause, the relative pronoun must be moved to the front of the clause – in front of the subject.
Examples:
The postcard shows a beautiful vista of the Grecian coastline.
I bought the postcard.
The postcard which I bought shows a beautiful vista of the Grecian coastline.
Object Relative Pronouns
People: Whom, Who or That
Things or Animals: Which or That
Possessive: Whose

6. Things to Remember
The relative pronoun replaces the noun – don’t use it and the noun in the dependent clause.
Example:
The postcard is pretty. I bought the postcard.
Incorrect: The postcard which I bought the postcard is pretty.
Correct: The postcard which I bought is pretty.
The relative pronoun must be next to the word it describes.
Incorrect: The sharks opened their mouths while they swam by the boat which were full of sharp teeth.
Correct: The sharks opened their mouths which were full of sharp teeth while they swam by the boat.

7. Things to Remember
Formal written English: In formal, academic English in adjective clauses with object relative pronouns, for people, we use whom. In adjective clauses with an object of a preposition, bring the preposition forward and use whom or which.
Example: Jack London, whom I admire, wrote a lot of short stories.
Rather than: Jack London, who I admire, wrote a lot of short stories.
Example: The presidency is the position to which many politicians aspire.
Rather than: The presidency is the position that many politicians aspire to.

8. Things to Remember
You must understand whether or not the dependent clause is essential information or extra information in the understanding of the noun. This impacts the meaning and the punctuation.
Essential clauses are also called identifying or restrictive. We DO NOT use commas with these clauses.
Extra clauses are also called non-identifying or non-restrictive. WE MUST use commas with these clauses. We cannot use the relative pronoun that.

9. Things to Remember
Can you understand a difference between these two sentences?
My sister, who lives in Bel Air, has three children.
My sister who lives in Bel Air has three children.
In which sentence is it clear that I have more than one sister?
What about between these two sentences?
He looked in the refrigerator, and he threw away the food which was rotten.
He looked in the refrigerator, and he threw away the food, which was rotten.
In which sentence is all of the food in the refrigerator rotten?

10. Identifying vs. Non-Identifying
Think about if a listener or reader would be able to identify the noun without the adjective clause.
Example:
He is the man who works at the grocery store.
This is essential (identifying) information. Think about it as two sentences.
He is a man.
He works at the grocery store.
Without the second sentence, you couldn’t identify him.
Notice that a become the because the noun changes from indefinite to definite because of the identification.

11. Identifying vs. Non-Identifying
Think about if a listener or reader would be able to identify the noun without the adjective clause.
Example:
Maria, who works as a physician’s assistant, enjoys her job.
This is extra (non-identifying) information. Think about it as two sentences.
Maria enjoys her job.
Maria works as a physician’s assistant.
You know her name from the first sentence. This is enough to identify her.