Cleft Sentences
How advanced speakers split one idea into two clauses to control emphasis, manage information, and sound genuinely fluent.
What a cleft sentence does
A cleft ("cleft" = divided) takes a single clause and breaks it into two, so that one piece of information is pushed into focus. The grammar is a tool for emphasis and contrast — not for adding new facts.
Compare a plain statement with its clefted versions. The facts are identical; only the spotlight moves. Plain: My brother broke the window on Friday. Cleft (focus on the doer): It was my brother who broke the window on Friday. Cleft (focus on the time): It was on Friday that my brother broke the window.
Why C1 learners need this: Clefts are everywhere in academic writing, debate, and natural speech. They let a speaker correct a wrong assumption ("Actually, it was the manager who approved it"), build suspense, and structure an argument. Using them well is one of the clearest markers separating B2 from C1.
The main types of cleft
Five patterns cover almost everything you will need. Master the first two first — they are by far the most frequent.
It-cleft
Use it to: single out one element (subject, object, time, place) and often to correct or contrast. The verb be is normally was/is; use who for people, that for everything (and even for people in less formal style).
Wh-cleft (pseudo-cleft)
Use it to: build up to the key information, which lands at the end. To emphasize an action, use What + subject + do + (to-)infinitive: "What she did was call the police."
Reversed wh-cleft
Use it to: front the focus instead. Same meaning as the wh-cleft, but it sounds more conversational and is common when responding to a previous point.
All-cleft
Use it to: signal "nothing more than this." All means the only thing, so it adds a sense of limitation or simplicity.
Other focusing clefts
Use it to: emphasize a reason, a thing, a place, or a person (The person who…). These are a flexible, natural alternative to the what-cleft.
Common C1 pitfalls
These are the mistakes that stop a clefted sentence from sounding native. Watch for them in your own writing.
Practice & score yourself
Ten questions across three formats. You get instant scoring and a full explanation for every answer — especially when you get one wrong.
Part A — Choose the best cleft
Teaching techniques for this point
Approaches that work well in a B2–C1 classroom. Each moves students from recognition to confident production.
The "spotlight" demonstration
Write one neutral sentence on the board and physically move a paper spotlight (or your hand) over each element — subject, object, time, place. For each position, elicit the matching cleft. Students see that clefting is purely about where the light shines, not new content.
Correction drills
Feed students deliberately false statements ("So, you said Anna wrote the report?"). They must defend the truth with an it-cleft: "No, it was Tom who wrote it." This anchors clefts to their most natural function — contrast and correction — and is highly communicative.
Sentence transformation races
In teams, students race to rewrite a plain sentence in as many cleft types as possible (it-cleft, wh-cleft, all-cleft…). Points for accuracy and variety. This builds flexibility and shows that the same idea has several emphatic packagings.
Guided discovery from a text
Give an authentic opinion article or TED transcript and have students highlight every cleft. They then categorize each and discuss why the writer chose emphasis there. Discovery beats rules: learners infer the pattern themselves, which improves retention.
Intonation & stress work
Clefts carry strong nuclear stress on the focused element. Drill minimal pairs aloud — "It was SHE who called" vs. "It was she who CALLED" — so students hear how stress and structure cooperate to signal focus. Pronunciation makes clefts sound real.
Personalized writing task
Ask students to write a short "what really matters to me" paragraph using at least four cleft types ("What I value most is…", "It's my family that…", "All I really want is…"). Personal content makes the structure memorable and gives you authentic output to assess.
The one rule to remember
A cleft never adds information — it repackages it. Decide which word you want to spotlight, then choose the structure that puts it center stage. Master that instinct and your English moves firmly into C1 territory.