What Is a Non-Defining Relative Clause?
A non-defining relative clause is a type of relative clause that provides additional information about a noun but is not essential to the meaning of the sentence. In other words, the sentence would still make sense without the non-defining relative clause, but it would be less detailed.
These clauses are usually separated by commas to show that the information is extra and not necessary to understand the main point. Non-defining relative clauses often describe a person, thing, or place in a more interesting way, giving the reader or listener extra details.
For example:
"My grandmother, who is very kind, gave me a gift." In this example, the main point is that "my grandmother gave me a gift," and the part "who is very kind" is additional information that describes the grandmother. The sentence still makes sense without it, but the description adds a personal touch.
Non-defining relative clauses are an important part of English grammar, as they allow us to add extra details and make our sentences more engaging.
Rules of Non-Defining Relative Clauses
Non-defining relative clauses follow some important rules. Understanding these rules will help both children and parents use them correctly in writing and speaking.
Use Commas: Non-defining relative clauses are always set off by commas. The commas show that the clause is extra information and not necessary to understand the sentence. This is the main difference between defining and non-defining relative clauses.
Example: "My brother, who lives in London, is visiting us next week."
Relative Pronouns: Non-defining relative clauses use relative pronouns like who, which, that, and whose. Who: Refers to people. Example: "The teacher, who is very kind, helped me with my homework." Which: Refers to things or animals. Example: "The book, which is on the table, belongs to my sister." Whose: Shows possession. Example: "The man, whose car is red, is my neighbor." That: While that is often used in defining relative clauses, it is not used in non-defining relative clauses.
Extra Information: Non-defining relative clauses provide additional, non-essential information about a noun. Removing the clause doesn’t change the basic meaning of the sentence.
Example: "The cat, which is very old, sleeps all day." The sentence still makes sense if we remove the non-defining relative clause: "The cat sleeps all day."
Pronouns in Non-Defining Clauses: In a non-defining relative clause, the relative pronoun refers back to the noun in the main sentence. The information in the clause gives us more about that noun. How to Use Non-Defining Relative Clauses
Non-defining relative clauses are easy to use once you understand the rules. Here’s how you can use them in sentences:
Identify the Noun You Want to Describe: Think about what or who you want to add extra details about. This could be a person, thing, or place.
Example: "My best friend."
Add the Non-Defining Relative Clause: After the noun, add a non-defining relative clause that provides extra details.
Example: "My best friend, who loves painting, is coming over today."
Use the Correct Relative Pronoun: Choose the correct relative pronoun based on the noun you are describing: Use who for people. Use which for things or animals. Use whose for possession. Remember the Commas: Make sure to add commas before and after the non-defining relative clause. This tells the reader that the information is extra and not essential. Examples of Non-Defining Relative Clauses
Here are some examples to show how non-defining relative clauses work in sentences:
For People: "The teacher, who is very nice, gave us a homework assignment." "My cousin, who lives in Paris, is coming to visit us next month." For Things: "The cake, which is chocolate, looks delicious." "The movie, which we watched last night, was really good." For Animals: "The dog, which is very friendly, loves to play fetch." "The bird, which sings every morning, is in the tree outside." For Possession: "The artist, whose paintings are famous, will visit our school." "The man, whose house is on the hill, is very kind."
In all these examples, the relative clauses provide extra information about the person, thing, or animal, but they’re not necessary for understanding the basic meaning of the sentence.
Common Mistakes
When learning non-defining relative clauses, there are a few mistakes that learners often make. Let’s go over some common ones and how to avoid them:
Omitting the Commas: One of the most common mistakes is forgetting to use commas. Non-defining relative clauses should always be separated by commas. Incorrect: "My father who is a doctor is visiting us." Correct: "My father, who is a doctor, is visiting us." Using “That” Instead of “Which”: In non-defining relative clauses, we don’t use that. Instead, use which or who. Incorrect: "The book that is on the table is mine." Correct: "The book which is on the table is mine." Confusing Defining and Non-Defining Clauses: Remember that non-defining relative clauses give extra information that can be removed without changing the sentence’s meaning. In contrast, defining relative clauses provide necessary information. Defining: "The book that is on the table is mine." Non-Defining: "The book, which is on the table, is mine." Incorrect Word Order: Sometimes learners mistakenly place the relative pronoun in the wrong position. Incorrect: "The dog who loves to play is very friendly." Correct: "The dog, who loves to play, is very friendly." Comparison: Defining vs. Non-Defining Relative Clauses
Let’s compare defining and non-defining relative clauses to see their differences:
Defining Relative Clauses: Provide essential information to identify the noun. Do not have commas. Use that, who, which, or whose. Example: "The girl who is wearing a red dress is my sister." Without the relative clause, we wouldn’t know which girl is being talked about. Non-Defining Relative Clauses: Add extra, non-essential information about the noun. Use commas to separate the clause. Use who, which, or whose (but not that). Example: "My sister, who is wearing a red dress, is very kind." The sentence still makes sense without the relative clause.
In short, defining clauses give us necessary information, while non-defining clauses give us extra details that we can remove without changing the meaning.
Practice Exercises
Let’s practice using non-defining relative clauses. Fill in the blanks with the correct relative pronoun and add commas where needed.
The dog, ________ is very playful, loves to run in the park. My grandmother, ________ lives in New York, is visiting us next week. The book, ________ I read last night, was fascinating. The teacher, ________ is very strict, gave us a surprise test. The man, ________ car was stolen, is my neighbor. The cake, ________ is made with chocolate, is delicious. Answers and Explanations
Here are the answers with explanations:
The dog, who is very playful, loves to run in the park. Who refers to the dog, which is a living being. My grandmother, who lives in New York, is visiting us next week. Who refers to the grandmother, a person. The book, which I read last night, was fascinating. Which is used for things. The teacher, who is very strict, gave us a surprise test. Who is used for people. The man, whose car was stolen, is my neighbor. Whose shows possession (the man’s car). The cake, which is made with chocolate, is delicious. Which is used for things. Learning Tips
Here are some tips to help you master non-defining relative clauses:
Practice with Real-Life Examples: Try adding non-defining relative clauses to sentences about people, places, or things in your everyday life. Use Flashcards: Create flashcards with different nouns and practice writing non-defining relative clauses for each one. Read Books or Articles: Look for non-defining relative clauses in books, articles, or stories. This will help you see how they are used in context. Play Games: Make learning fun with games that involve adding extra information to sentences using non-defining relative clauses.
By practicing and using these tips, children can confidently master non-defining relative clauses and use them to make their sentences more descriptive and interesting.