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Cleft Sentences: It was… / What I need is…
C1Grammar
1. Simple explanation
A cleft sentence is a sentence split into two parts so that one piece of information gets the focus — the focus is the part you most want the listener to notice. Instead of the flat 'Maria called yesterday,' you can point at Maria: 'It was Maria who called yesterday.' There are two main patterns. The it-cleft: It + be + the focused piece + who/that + the rest. And the what-cleft: What + a clause + be + the focused piece: 'What I need is a break.' Use clefts to correct someone, to contrast two things, and to explain what really matters.
2. Detailed explanation
A cleft sentence is a sentence cut into two parts so that one piece of information gets the spotlight. The word cleft means 'split.' The piece in the spotlight is called the focus — the part you most want the listener to notice. Start from a flat, neutral sentence: 'Maria called yesterday.' It gives three facts calmly: who (Maria), the action (called), when (yesterday). But sometimes one fact is the whole point. A cleft lets you point at that fact: 'It was Maria who called yesterday.' Same facts, but Maria is now in lights.
The first pattern is the it-cleft: It + be + the focused piece + who/that/which + the rest of the sentence. You can focus almost any piece. The doer: 'It was Maria who called.' The thing: 'It was the blue car that he bought.' The time: 'It was yesterday that I saw him.' The place: 'It was in Cairo that they met.' Be changes with the time: It is (now/general), It was (past). Questions and negatives are easy: 'Was it Maria who called?' 'It wasn't me who broke it.' Use who for people, which for things in careful writing, that for both in everyday English. The it means nothing — it is just the frame holding the picture.
The second pattern is the what-cleft (pseudo-cleft): What + clause + be + the focused piece. The what-clause names something in general words; the piece after be gives the exact answer: 'What I need is a break.' It is perfect for needs, wants, and opinions: 'What surprised me was her calm reaction.' 'What I hate is waiting.' You can reverse it — 'A break is what I need' — slightly more written in feel. For actions, English often uses do in the what-clause: 'What he did was apologize.' For events, the fixed opener 'What happened was…' starts a story: 'What happened was, the train never came.' Two cousins complete the family: 'All I want is a quiet evening' (all = the only thing) and 'The reason (why) I left is that the noise was terrible' — that, not because, after the reason.
Take 'What she bought was a bike' apart: What she bought (an unknown purchase) + was (agreeing with the singular answer) + a bike (the focus). Be careful: in a what-cleft, be agrees with the focused piece, not the clause — 'What I need is a pen,' but 'What I need are two pens.' An it-cleft behaves differently: in 'It was the keys that I lost,' we still say was, because be agrees with it, not with the plural focus.
Remember this first: memorize three things. One: It + be + focus + who/that + rest — for pointing at a person, thing, time, or place, especially to correct someone. Two: What + clause + be + focus — for needs, feelings, and explanations; the natural spoken choice. Three: never build a double frame — 'What I need it's a break' is the classic error.
3. Formula / structure
Step by step — how to build a sentence:
It-cleft: 1) Take the flat sentence: 'Maria called yesterday.' 2) Choose the focus: Maria. 3) Build the frame: It was + Maria. 4) Join the rest with who: 'It was Maria who called yesterday.' What-cleft: 1) Describe the gap: 'What I need…' 2) Add be: 'What I need is…' 3) Drop in the answer: 'What I need is a break.'
The reason why:
The reason (why) + clause + be + that + clause → The reason I called is that I need your help. (Never '…is because…' — reason and because say the same thing twice.)
all / the thing:
All (that) + clause + be + focus → All I want is a quiet evening. | The thing that + clause + be + focus → The thing that annoys me is the noise.
it-cleft:
It + is/was + FOCUS + who/that/which + rest → It was Maria who called yesterday. / It was the blue car that he bought. / It was yesterday that I saw him.
it-cleft question & negative:
Question: Was/Is it + focus + who/that …? → Was it Maria who called? Negative: It wasn't/isn't + focus + who/that … → It wasn't me who left the door open.
what happened was:
What happened was + (that) + clause → What happened was, the train never came. (A natural story-opener.)
what-cleft (pseudo-cleft):
What + clause + be + FOCUS → What I need is a break. / What surprised us was the price. With actions: What + subject + did + was/were + verb phrase → What he did was apologize.
what-cleft reversed:
FOCUS + be + what + clause → A break is what I need. / Silence is what she wanted.
4. When to use it
To correct a wrong idea: 'It wasn't Peter who called — it was Maria.'
To contrast two people or things: 'It was the red one that I chose, not the black one.'
To say what you really need or want: 'What I need is more time.'
To explain events before a story: 'What happened was, the car wouldn't start.'
To give a reason in a tidy frame: 'The reason I stayed is that I was waiting for you.'
To stress a time or place: 'It was in 1998 that the shop opened.'
5. When NOT to use it
Don't add a second subject to a what-cleft: ✗ 'What I need it's a break' → ✓ 'What I need is a break.'
Don't use which for people: ✗ 'It was the teacher which helped me' → ✓ 'It was the teacher who helped me.'
Don't say 'the reason … is because': ✗ 'The reason I came is because I missed you' → ✓ 'The reason I came is that I missed you.'
Don't cleft every sentence in a paragraph — when everything is emphasized, nothing is. One cleft per point is enough.
Don't use a what-cleft when the correction is about a person and blame matters: 'It was Dan who broke it' is sharper than 'What Dan did was break it' when you need to correct a name.
6. Positive examples
It was Maria who called yesterday.
It was the blue car that he bought.
It was in Cairo that they first met.
It was yesterday that the package arrived.
What I need is a long break.
What surprised everyone was her answer.
What he did was apologize immediately.
All I want is a quiet evening at home.
The reason I called is that I need your address.
What happened was, the train never came.
A second chance is what he asked for.
It was the manager who approved the request.
7. Negative examples
It wasn't me who left the door open.
It was not the money that worried her.
It is not what he said that matters.
What I don't understand is the last step.
It wasn't in June that they married — it was in July.
What she never does is complain.
It was not until 2019 that the bridge opened.
8. Questions
Was it Maria who called, or Peter?
What is it that you want exactly?
Is it the price that bothers you?
What was it that she said to him?
Was it in 2019 that the company opened?
What do you mean — what is it that went wrong?
9. Short answers
It was me. (answer to 'Who called?' — everyday American form)
What I need is rest — that's all.
That was Dan, actually. It was Dan who…
Not me — it was her.
All I know is that he left early.
10. Common mistakes
✗ What I need it's a break✓ What I need is a break.The what-clause is already the subject — adding 'it's' builds a second, wrong subject. One frame only: What I need + is + a break.
✗ It was Maria which called yesterday✓ It was Maria who called yesterday.Maria is a person, so the joining word is who — or that in everyday English. Which is for things, never for people.
✗ What did I lose was my keys✓ What I lost was my keys.Inside a what-clause there is no question form and no did: the clause keeps normal statement order — What I lost.
✗ What I need are a break✓ What I need is a break.In a what-cleft, be agrees with the focused answer. 'A break' is singular, so is. Compare: 'What I need are two days off.'
✗ The reason why I left is because I was tired✓ The reason I left is that I was tired.The reason and because mean the same thing — using both says it twice. After 'the reason,' use that.
✗ Was Maria it who called you?✓ Was it Maria who called you?In an it-cleft question, only it and be change places: Was + it + Maria. The focus stays inside the frame.
✗ It was the noise what kept me awake✓ It was the noise that kept me awake.What cannot join an it-cleft. The joining words are who, that, and which — what belongs to the other pattern.
11. American English notes
🇺🇸 American English
Clefts are one of the most natural emphasis tools in American English because they work in speech: 'It was John who told me' and 'What I really need is coffee' sound completely at home in conversation, unlike inversion, which sounds written. Americans use what-clefts constantly to organize talk: 'What happened was, the car broke down.' 'What I'm saying is…' 'What you want to do is…' In office and service English, 'The reason I'm calling is…' and 'The thing is…' open explanations politely. One usage note: 'It is I who…' is the old formal rule, but almost all Americans say 'It was me who called' in real life — 'It is I' now sounds like a costume. For blame and correction, the it-cleft is the everyday American choice: 'It wasn't me who left the door open — it was Dan.'
12. Similar grammar — comparison
Compare
Clefts and inversion both create emphasis, but in opposite registers: clefts are the conversational tool, inversion the literary one. 'It was only then that I understood' belongs in speech and normal writing; 'Only then did I understand' belongs in novels and speeches. A cleft is also related to a relative clause — the second half ('…who called') looks exactly like one, because the focused piece is joined to the rest with who/that/which, exactly as in the Relative Clauses lesson. And where a plain sentence plus strong word stress can emphasize one word ('MARIA called'), a cleft can emphasize long pieces too: 'It was the little café by the station that I meant.'
13. Natural spoken English
'It was Tom who ate the last slice, not me!'
'What I really need right now is coffee.'
'What happened was, my phone died.'
'The thing is, we just don't have the money.'
'What I'm saying is, take your time.'
'All I want is five quiet minutes.'
14. Real-life examples
Correcting a mix-up at work: 'It wasn't Sara who sent the file — it was Omar.'
Customer service: 'What I can do for you today is offer a full refund.'
A complaint: 'What bothers me is the noise after midnight.'
Explaining a delay: 'The reason the flight left late is that the crew arrived late.'
A news sentence: 'It was the goalkeeper who saved the final penalty.'
Storytelling to a friend: 'What happened was, we got completely lost in the old town.'
15. Mini dialogue
AI heard Peter broke the office printer again.
BActually, it was Dan who broke it. Peter just reported it.
AOh! And who ordered the new one?
BThat was me. What we really need is a second printer, though.
ATrue. What happened was, everyone prints at 9 a.m. at once.
BExactly. What I want is a simple rule: big jobs after lunch.
AGood idea. It was your suggestion that saved us last time, after all.
BLet's hope it works again.
16. Summary
Clefts split a sentence to focus one piece of information: it-clefts (It + be + focus + who/that + rest) point at people, things, times, and places, while what-clefts (What + clause + be + focus) frame needs, feelings, and explanations — natural in speech and writing alike.
17. Practice exercises
Warm up with the first questions, then take the full quiz — every answer has a detailed explanation (parts 19–20 of this lesson: answer key + explanations live inside the quiz feedback).
18. The full quiz
50 questions, mixed formats, in difficulty order: easy → medium → intermediate → challenging → advanced.