Where it appears in the exam
What is it?
The causative expresses that you ARRANGE, MANAGE or SUFFER an action — not that you perform it yourself. It is formed with have/get + object + past participle: 'I had my car repaired' means a mechanic did it, not me. At B2 level, the difficulty isn't knowing what the causative is — it's distinguishing it from the Past Perfect ('I had repaired the car' = I did it) and handling the variants with an agent ('I had the mechanic repair it' vs 'I got the mechanic to repair it').
Why it matters in the exam
It is tested in Part 2 and Part 4. In Part 2, the gap usually asks for 'had' (the causative verb) or 'to' (with 'get + person + to do'). In Part 4, transforming active to causative is a pattern that appears frequently: 'A mechanic repaired my car' becomes 'I HAD MY CAR REPAIRED by a mechanic'. Additionally, the involuntary causative ('She had her purse stolen') adds a layer of meaning that Cambridge exploits in the prompts.
The cognitive trap
"The instinct: 'I repaired the car' when meaning someone else did it"
Why your brain does this: most languages lack a compact causative structure. Your brain defaults to the simpler active form ('I repaired the car') even when you mean someone else did the work. The distinction between doing and arranging is not grammatically mandatory in most languages — but in English it is.
"I had my car repaired" — compact causative structure
Why it matters in the exam: English compresses 'someone did it for me' into a single compact structure: have/get + object + past participle. No extra verb needed. Word order is the ONLY signal: 'I had repaired the car' (I did it) vs 'I had the car repaired' (someone else did). Same words, different order, opposite meaning.
'Have' — two structures, opposite meaning
Past Perfect — YOU performed the action
SUBJECT + had + past participle (immediately after)
"I had repaired the car before she arrived." (I did the repair)
Present Perfect — has/have + participle
SUBJECT + has/have + participle (Present Perfect)
"I have repaired the car." (I did the repair — recent)
Voluntary causative — SOMEONE ELSE did it for you
SUBJECT + had + OBJECT + past participle
"I had the car repaired at the garage." (The mechanic did it)
Involuntary causative — something HAPPENED to you
SUBJECT + had + POSSESSION + past participle (negative context)
"She had her bag stolen on the metro." (Her bag was stolen)
Have + person + bare infinitive (formal)
SUBJECT + have + PERSON + infinitive WITHOUT 'to'
"I had the mechanic check the brakes." (I asked him to check)
Get + person + to + infinitive (informal)
SUBJECT + get + PERSON + 'to' + infinitive
"I got my friend to help me move." (I persuaded them to help)
Recognition pattern
In the exam, look for the key signal first. The answer follows.
How to distinguish the causative from other structures with 'have'
"I had [my car] repaired." — object between had and PP = causative.
"I had repaired [my car]." — PP immediately after had = past perfect, NOT causative.
"She had her hair done at the salon." — professional services = causative.
"I had the plumber fix the leak." — have + person + inf without 'to'.
"I got my sister to lend me her car." — get ALWAYS takes 'to'.
"I got my phone fixed." — get = informal version of have.
"He had his passport confiscated at the border." — he didn't choose this.
"You need to get your eyes tested." — you need someone else to do it.
"I had it repaired by a mechanic." — 'by' confirms someone else did it.
Word order changes EVERYTHING
I had repaired my car last week.
Past Perfect Active: I repaired it at a time before another past event. The participle comes IMMEDIATELY after 'had', with no intervening object. Same words, different order, opposite meaning.
I had my car repaired last week.
Causative: had + OBJECT (my car) + PP (repaired). Someone repaired it for me. The object sits between 'had' and the participle.
I got my friend help me move.
Without 'to', the structure with 'get' is incorrect. Only 'have' allows bare infinitive with an agent: 'I had my friend help me' (no 'to').
I got my friend to help me move.
Get + person + TO + infinitive. With 'get', 'to' is mandatory when there's an agent. I persuaded them to help.
She had stolen her purse on the metro.
Past Perfect Active: she stole a purse (she is the thief). 'Had stolen' without an intervening object = Past Perfect. The causative requires the object BETWEEN 'had' and the participle.
She had her purse stolen on the metro.
Involuntary causative: had + possession (purse) + PP (stolen). She was robbed — something bad happened to her. The object goes between 'had' and the participle.
We're having painted the house next week.
The order is FIXED: having + OBJECT + participle. The object always goes before the participle in the causative. 'Having painted' without an intervening object would be a perfect participle clause (having painted).
We're having the house painted next week.
Causative in Present Continuous: be + having + object + PP. A painter will do it next week.
Why your brain gets it wrong
The learner's short circuit
Analyse the trap by exam format
Before leaving for the airport, she ______ her suitcase checked by a colleague to make sure she hadn't forgotten anything.
Your brain might read 'she checked her suitcase' as active and not see that anything is missing. Or you might write 'has' thinking of Present Perfect. But 'by a colleague' reveals that SOMEONE ELSE did it — causative. And 'before leaving' places the action before another past action — 'had'.
by a colleague
'By a colleague' = explicit agent — passive or causative. Subject + ___ + object + PP + by agent = causative. The gap is 'had'.
→ had
The invisible 'had' when there's an agent
In Part 2, Cambridge places the agent ('by a colleague') as a clue. Without the gap, the sentence seems active. With 'had', it becomes causative: she didn't check — she asked someone to check. The agent confirms the structure.
Strategy
Look for 'by + someone' in the sentence. If it appears, the subject did NOT perform the action — you need causative ('had') or passive ('was'). If the subject is a person and the action is a service — causative.
After weeks of trying, she finally got her landlord ______ fix the broken heating system.
Your brain processes 'got her landlord fix' as correct because it sounds similar to 'had her landlord fix' (which IS correct without 'to'). But 'got' is not 'had'. With 'get' + person, 'to' is MANDATORY. Without 'to', the structure collapses.
got ... ___ fix
'Got' + person — look for 'to' before the infinitive. 'Had' + person — bare infinitive (no 'to'). This is the ONLY structural difference between have and get with an agent.
→ to
The invisible 'to' trap with 'get'
Cambridge knows that learners memorise 'have/get something done' as equivalent. They are when there's no agent. But WITH an agent, the structures diverge: have + bare infinitive vs get + to + infinitive. The gap tests the difference.
Strategy
Is the verb 'have' or 'get'? Have — no 'to' (had him repair). Get — with 'to' (got him to repair). Remember: GET always takes TO when there's a person.
While they were away, the Smiths unfortunately 5 during a break-in.
Option A ('had stolen their television') = Past Perfect Active: the Smiths stole the TV (they are the thieves). Option C has the wrong tense ('have' = present, but 'while they were away' = past). Option D mixes passive with causative. Only B has the correct involuntary causative word order: had + object + PP, with the tense in the past.
The involuntary causative: same form, opposite context
'Had their television stolen' uses EXACTLY the same structure as 'had their house painted'. The grammar doesn't change — what changes is whether the subject CHOSE the action or SUFFERED it. 'Unfortunately' and 'break-in' are the contextual clues.
Strategy
Don't try to distinguish voluntary from involuntary causative by the grammar — they are identical. Read the CONTEXT: did the subject arrange something (salon, mechanic, photographer) or did something happen to them (thief, accident, fire)? Context decides.
Causative (have/get something done) is 1 of 82
The exam tests 82 grammar competencies across 19 families. Mastering one is the first step. Automating all 82 is passing.
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