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Noun Clauses: Definition, Types, Rules, and Examples

A noun clause is a dependent clause that acts as a noun in a sentence. It can function as a subject, object, or complement and usually begins with words like that, what, who, whether, why, or how. Noun clauses help students write more detailed and meaningful sentences. By learning how to identify them and replace them with pronouns like “it,” students can easily understand their role in English grammar.
authorImageNivedita Dar23 Feb, 2026
Noun Clauses: Definition, Types, Rules, and Examples

Ever felt confused when a whole group of words acts like a single name or object? You are likely dealing with noun clauses. For Class 7 students, mastering these is the secret to moving from simple sentences to sophisticated writing. This guide simplifies how to identify and use them effectively in English.

What are Noun Clauses?

In English grammar, a clause is a group of words containing a subject and a verb. While some clauses can stand alone, others cannot. They are a type of dependent clause, meaning they rely on the rest of the sentence to make sense. Their primary job is to do exactly what a noun does: represent a person, place, thing, or idea.

To understand the meaning, think of them as "replacement parts." If you can replace a whole group of words with the pronoun "it" or "him/her," you have found your clause. For example:

  • "I know that he is honest." (I know it.)

  • "What she said was surprising." (It was surprising.)

How to Identify them in a Sentence?

Finding these clauses might seem tricky at first, but there are specific markers to look for. Most of them begin with "wh-" words or the word "that". Common introductory words include:

  • That

  • Whether / If

  • Who / Whom / Whoever

  • What/Whatever

  • Where / When / Why / How

A great tip for identifying them is to look for the "what" or "who" in the sentence. If you ask a question using the main verb, the answer is often the clause. In the sentence "She wonders where he went," ask: What does she wonder? The answer is the clause.

Different Types of Noun Clauses

Depending on where they sit in a sentence, these clauses take on different roles. Just as a single noun can be a subject or an object; these clauses are flexible.

1. The Subject of a Verb

Sometimes the clause performs the action. It usually appears at the very beginning of the sentence.

  • Example: "Whether it will rain today is uncertain."

2. The Object of a Transitive Verb

This is the most common use. The clause follows a verb to show what the action is directed toward.

  • Example: "I believe that you are right."

3. The Object of a Preposition

When a clause follows words like to, for, about, or with, it acts as the object of that preposition.

  • Example: "Pay attention to what the teacher says."

4. The Subject Complement

This type follows linking verbs (like 'is', 'am', and 'are') to describe or rename the subject.

  • Example: "My biggest fear is that I might fail."

Here’s the quick summary of noun clause types: 

Role of Clause

Position in Sentence

Example

Subject

Before the main verb

What he did shocked us.

Direct Object

After a transitive verb

She knows how to cook.

Prepositional Object

After a preposition

I am interested in who wins.

Complement

After a linking verb

The truth is that we lost.

Read More - Noun: Definition, Types, Rules, and Examples

Important Rules for Using Noun Clauses

To use them correctly, you need to keep a few grammatical rules in mind. These ensure your sentences flow naturally and stay grammatically sound.

  • No Inversion: Unlike questions, these clauses do not swap the subject and verb. You say "I know where he is," not "I know where is he."

  • The "That" Rule: In many cases, the word "that" can be removed if the meaning stays clear (e.g., "I think [that] it’s cold").

  • Singular Agreement: When a clause is the subject, the main verb of the sentence is almost always singular.

  • Tense Harmony: If the main verb is in the past tense, the verb inside the clause often shifts to the past tense as well.

Clear Noun Clauses Examples

Seeing these in action is the best way to learn. Here are some examples based on common sentence structures:

  1. "How he solved the puzzle was brilliant." (Subject)

  2. "The doctor suggested that she take a rest." (Object)

  3. "He was worried about how his parents would react." (Object of Preposition)

  4. "Whoever finishes first gets a prize." (Subject)

  5. "I don’t know if they are coming." (Object)

Read More - Noun Phrase - Definition, Uses, Examples

Noun Clauses Worksheet

Test your knowledge by identifying the noun clause in the following sentences. Try to determine if they are subjects or objects.

  1. Tell me what you want for lunch.

  2. Whether you stay or go does not matter to me.

  3. I wonder why the sky is blue.

  4. The news that the school is closed made everyone happy.

  5. Give the book to whoever needs it most.

(Answers: 1. Object, 2. Subject, 3. Object, 4. Complement, 5. Object of Preposition)

Tips for Noun Clauses in English Grammar

Mastering these clauses helps you combine short, choppy sentences into meaningful thoughts. Instead of saying, "He said something. "It was true," you can say, "What he said was true." This level of writing is exactly what examiners look for in Class 7.

Remember to look for those "wh-" starter words and always check if the entire clause can be replaced by "it". If it can, you’ve successfully mastered the noun clause!

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Noun Clauses FAQs

What are the most common types of noun clause?

The most frequent types include those acting as the subject of a sentence, the direct object of a verb, or the object of a preposition.

How do I know if a group of words is a noun clause?

You can identify clauses by replacing the whole clause with the word "it." If the sentence still functions, it is a noun clause.

Can a noun clause start with 'if'?

Yes, 'if' and 'whether' are often used interchangeably to express doubt or uncertainty, such as "I don't know if he's coming."

Where can I find a worksheet?

Many educational resources, including Physics Wallah, provide worksheet sections in their grammar guides to help students practice identifying subjects and objects.

What is a simple noun clauses meaning for kids?

The simplest meaning is a group of words with a subject and verb that works together to act like a single noun.
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