In everyday conversation, we constantly adjust how we present information to make sure our listener understands what’s most important. You might tell a friend, “I need a new phone.” But if they misinterpret this as a casual wish, you might rephrase for clarity: “No, what I need is a new phone. My current one doesn’t work anymore.” That small change in structure adds a powerful layer of focus.

This rephrasing uses a special grammatical tool called a cleft sentence. Advanced English speakers use these structures constantly, often without thinking, to guide attention, correct misunderstandings, and add emphasis. Understanding how they work is key to reaching a more nuanced and native-like level of expression.

What Is a Cleft Sentence?

The word “cleft” means split or divided. A cleft sentence is a sentence that has been split into two parts, each with its own verb, to emphasize a specific piece of information. Instead of a simple sentence like “Maria wrote the report,” you can split it to highlight different elements.

These are powerful English focus structures because they move a key piece of information to the front of the sentence, signaling to the listener: “Pay attention, this is the important part.”

There are two primary types of cleft sentences in English that you’ll encounter and want to master: the what-cleft (also called a pseudo-cleft) and the it-cleft.

Explaining and Specifying with What-Clefts

A what-cleft is perfect for explaining, clarifying, or specifying something. It presents information as the answer to an unspoken question. The structure typically looks like this: What-clause + BE verb + emphasized information.

Let’s look at a basic sentence:

  • Simple: I want a cup of coffee.
  • What-cleft: What I want is a cup of coffee.

The second version emphasizes “a cup of coffee.” It answers the implicit question, “What do you want?” This structure is incredibly useful when you need to correct a misunderstanding or clarify your point. For example, if someone offers you tea, you can politely refuse and clarify by saying, “Thank you, but what I’d really like is a cup of coffee.”

This form is also extremely common for organizing your thoughts while speaking. You might use a phrase like “what I mean is” to pause and reframe your message. Consider this scenario:

“I’m not upset about the delay. What I mean is, I’m concerned we won’t have enough time to prepare once the delivery arrives.”

Here, the what cleft serves to pivot from an emotion (not being upset) to the real issue (concern about preparation time). It’s a sophisticated way to manage the flow of conversation.

Creating Contrast and Correction with It-Clefts

The second major type, the it cleft, is a powerhouse for creating contrast and making corrections. It singles out one piece of information from a set of alternatives, making it clear that this, and not something else, is the correct information. The structure is: It + BE verb + emphasized information + that/who/which clause.

Let’s go back to our earlier example, “Maria wrote the report.” We can use an it cleft in English to focus on different parts of that idea.

  • To focus on the person: “It was Maria who wrote the report.” (Not John, not me, but Maria.)
  • To focus on the object: “It was the report that Maria wrote.” (Not the email, not the memo, but the report.)

This structure is inherently contrastive. You use it when you assume your listener might be thinking of another possibility. If someone says, “Did John finish the report?” you can deliver a direct and emphatic correction: “No, it was Maria who wrote the report.”

The choice of that, who, or which depends on what you are focusing on. Use who for people and that or which for things. In modern usage, that is extremely common for both people and things in this structure.

Choosing the Right Cleft for Your Message

So, when do you use a what cleft versus an it cleft? While both add focus, they serve slightly different conversational purposes. The distinction between a what cleft and an it cleft in English can be subtle but important.

Let’s take a new sentence: “The storm broke the window.”

  • It-cleft: “It was the storm that broke the window.”

    • Context: Someone might have blamed a person or a stray baseball. This sentence corrects that assumption. The focus is on the storm in contrast to other possible causes.

  • What-cleft: “What broke the window was the storm.”

    • Context: This sounds more like an explanation. The main information is that the window is broken, and now you are specifying the cause. It answers the question, “What broke the window?”

Generally, it-clefts feel more pointed and are excellent for direct correction. What-clefts feel more explanatory and are great for clarifying or defining the most important aspect of your message.

Practice Putting Clefts to Work

Reading about grammar is one thing; making it part of your active vocabulary is another. The best way to internalize these patterns is to practice transforming simple sentences into more focused ones. At LingFitPro, we design exercises that turn this kind of structural knowledge into an automatic skill.

Try it now. Take these simple statements and rephrase them using both an it-cleft and a what-cleft. Say them out loud to get a feel for the rhythm.

  1. Simple Statement: The marketing team needs the final analytics.

    • It-cleft (focus on the object): It’s the final analytics that the marketing team needs.
    • What-cleft (focus on the object): What the marketing team needs are the final analytics.

  2. Simple Statement: I found his last comment the most insightful.

    • It-cleft (focus on the object): It was his last comment that I found the most insightful.
    • What-cleft (focus on the object): What I found the most insightful was his last comment.

  3. Simple Statement: A software glitch caused the system failure.

    • It-cleft (focus on the cause): It was a software glitch that caused the system failure.
    • What-cleft (focus on the cause): What caused the system failure was a software glitch.

By practicing these transformations, you’ll develop a better ear for when to use each structure, adding a new level of precision and emphasis to your spoken English.