Where it appears in the exam
What is it?
Emotion verbs in English produce two adjectives, not one. The -ing form names whatever causes the feeling: the film, the news, the journey. The -ed form names whoever receives it: the viewer, the reader, you. They are two roles in the same scene, and English forces you to say which one you are naming.
Why it matters in the exam
This is the competency with the widest gap between knowing the rule and applying it. Almost everyone can recite 'bored is how you feel, boring is what causes it' and still fail in Part 3, because there you do not have to remember the rule: you have to decide in two seconds whether the noun next to the gap feels or causes, with the root word in capitals pulling you the other way.
The cognitive trap
"The instinct: reaching for one adjective and letting the verb or the context say who felt what."
Why your brain does this: most languages mark the difference somewhere other than the adjective — in the verb, in a reflexive, in the word order — and leave the adjective untouched. If the word never changes in your language, you were never trained to ask which of the two roles you are naming: that question had already been answered before you reached the adjective.
The film was boring. · I was bored. · The result was disappointing. · I was disappointed.
The English rule: the distinction lives in the adjective and nowhere else — was serves both. So all the information sits in three final letters, and choosing wrong does not produce a strange sentence but a correct one that means the opposite.
Recognition pattern
In the exam, look for the key signal first. The answer follows.
What decides without reading the whole sentence
The results were <strong>surprising</strong>. · It was an <strong>exhausting</strong> journey.
The passengers were <strong>exhausted</strong>. · She looked <strong>confused</strong>.
He is a <strong>boring</strong> lecturer. · She was the most <strong>fascinating</strong> guest.
interested <strong>in</strong> · worried <strong>about</strong> · frightened <strong>of</strong> · surprised <strong>by</strong>
We were <strong>delighted</strong> to hear the news. · I was <strong>relieved</strong> to find it open.
a <strong>broken</strong> promise · the <strong>rising</strong> cost · <strong>boiled</strong> water
They asked for a <strong>disinterested</strong> assessment of the claim.
The six that cost marks
I was boring during the second half of the film.
Grammatical, and it says you bored everyone else. An examiner does not read it as a form error: they read it as what it says.
I was bored during the second half of the film.
You are the one receiving the boredom, so -ed.
The results were disappointed.
Gives a feeling to something that cannot feel. It is the single most common Part 3 error with emotion roots.
The results were disappointing.
Results cause disappointment; they do not feel it.
She's interesting in nineteenth-century architecture.
Two errors at once: the form says she is the interesting one, and 'interesting' does not take 'in'. It would be 'interesting to'.
She's interested in nineteenth-century architecture.
Human subject, inner state, and the preposition that belongs to it: in.
We were exhausting after the climb.
It says you wore everyone else out. The same slip happens daily with tiring/tired.
We were exhausted after the climb.
The human subject receives the tiredness.
He seemed disinterested in the offer and left early.
It says he had no stake in it, which in a negotiation means something else entirely. Cambridge uses this pair in Part 3 with the root INTEREST.
He seemed uninterested in the offer and left early.
He did not care for it. This is the direct opposite of 'interested'.
The whole experience was terrified.
The -ed form has been attached to the wrong subject. Always check what the subject of this sentence actually is, not who you were talking about before.
The whole experience was terrifying.
The experience causes the fear.
Why your brain gets it wrong
The learner's short circuit
Analyse the trap by exam format
Although the ending was rather ______, the performances were widely praised. (DISAPPOINT)
The sentence is about something going wrong, and as you read it you step into the viewer's shoes: the one who was disappointed was you. But the gap does not describe the viewer, it describes the ending. The brain picks the adjective it identifies with rather than the one that agrees with the noun in front of it.
the ending
The subject of the gap is 'the ending'. An ending cannot feel anything: it can only cause. When the root is an emotion verb, read backwards to the noun and ask whether it breathes.
→ disappointing
Part 3 gives you no second guess
In Part 3 the root sits in capitals beside the gap and pulls you towards the verb, not towards the noun. The task is not testing whether you know the word: it is testing whether you look in the right place.
Strategy
Cover the root with your finger and read the sentence alone. If the word in the gap belongs to something that does not breathe, it is -ing. If it belongs to someone, move on to the second question.
Her grandmother was the most ______ storyteller in the village, and the children would sit for hours. (FASCINATE)
The shortcut almost everyone memorises — «person, -ed; thing, -ing» — is right on about eight items in ten, and that is exactly what makes it dangerous: here the subject is a person and the answer is -ing. What decides is not whether the subject can feel, but which role in the scene you are naming.
the children would sit for hours
The grandmother is not fascinated: the children are, and the sentence says so — they sit there for hours. When you can see another character receiving the feeling, the subject of the gap is the cause.
→ fascinating
The shortcut works until Cambridge uses it against you
An item solved by «person = -ed» discriminates nothing, so the good items are precisely the ones that break the shortcut: people described by the effect they have.
Strategy
Look in the rest of the sentence for whoever the feeling is happening to. If you can see someone else — the children, the audience, the readers — feeling it, then the subject of the gap is the cause and takes -ing.
The committee wanted a ______ expert to review the evidence before any decision was taken. (INTEREST)
Un- is the default negative prefix and it is right with most roots. But INTEREST produces two negatives that do not mean the same thing: uninterested is having no interest, disinterested is having no interest at stake. The brain treats the two prefixes as interchangeable because for the vast majority of words only one of them exists.
review the evidence before any decision
The context is about reviewing evidence before a decision: what is wanted is impartiality, not indifference. A committee looking for an 'uninterested' expert would be looking for someone who does not want the job.
→ disinterested
Two negatives for one root
Part 3 is not only testing word class: it is testing the exact shade the context switches on. When a root takes two prefixes, that is where the mark is — not in the suffix.
Strategy
If you are torn between un- and dis-, read the whole sentence for the semantic field: neutrality, arbitration and conflict call for dis-; enthusiasm, attention and boredom call for un-.
Participial adjectives (-ed / -ing) 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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