Word formation is Part 3 of the C1 Advanced Reading and Use of English paper. You get a text with eight gaps. At the right of each gap line there is a word in capital letters, and you change it to fit. The change might be a different word class, a plural, a negative or a different verb form. One wrong ending loses the mark, so the method matters more than the vocabulary.

This guide covers what Part 3 asks, how it is marked, a five-step method, and three practice texts from the ScoreFluent bank with answer keys and reasons. The neighbouring Use of English parts are open cloze and key word transformations.

What is word formation in C1 Advanced?

Part 3 is one text with eight gaps and one mark per gap (Cambridge exam format). The handbook describes the stem words as appearing in capital letters to the right of the text. Cambridge says the focus is primarily lexical, though an understanding of structure is also required. It tests how prefixes, suffixes, internal changes and compounds form words. You may need to understand the text beyond the sentence (C1 Advanced Handbook for Teachers).

Checked 15 and 16 October 2026 against the sources linked above. ScoreFluent is not affiliated with Cambridge University Press & Assessment.

How is word formation marked?

One mark per correct gap. A wrong answer or no answer scores zero, with no negative marking. Spelling must be accurate in all parts, and American spelling is acceptable if you do not mix it with British (information for candidates). Part 3 feeds the Use of English score, which Cambridge bases on Parts 2, 3 and 4 (same source). On paper, write answers in capital letters on the answer sheet for Parts 2, 3 and 4 (handbook).

How do I choose the right form?

The handbook tells candidates to decide which class of word (noun, verb, adjective or adverb) each gap needs, from the context of the text. Here is a five-step version:

  1. Decide the word class from the position. After a remarkable you need a noun (revive becomes revival). Before a noun you need an adjective (person becomes personal). Before an adjective you need an adverb (exception becomes exceptionally). After will you need a verb (height becomes heighten).
  2. Check for a negative. Cambridge says there is usually at least one negative prefix in each Part 3 task. Look for contrast words nearby, such as yet, though, but and rather than. In "Yet some historians remain …… about whether digital files will last", the yet points to uncertain, not certain.
  3. Check number and verb form. Thousand before of enthusiasts becomes thousands. A participle may be needed: staggering sums, or outlawed after have.
  4. Choose the form that fits the meaning. Durable becomes durability, a noun, after a question of. Limit becomes unlimited, because access needs an adjective meaning without restriction. If a stem has several derivatives, the sentence shows which one is needed.
  5. Check the spelling. Change the final letters correctly: imaginative, durability, heighten. One missing letter loses the mark.

Which kinds of change do the practice texts ask for?

The three practice texts below contain these changes. This is what our bank items show, not a count of what Cambridge uses:

  • Noun to adjective or adverb. Society to social, person to personal, accurate to accurately.
  • Verb to noun. Participate to participation, degrade to degradation.
  • Adding a negative prefix. Certain to uncertain, clear to unclear, practical to impractical, likely to unlikely.
  • Verb to adjective. Stagger to staggering, commend to commendable, imagine to imaginative.
  • Plurals. Thousand to thousands.

What mistakes lose marks in word formation?

  • Right idea, wrong class. Writing society where an adjective (social) is needed. Always name the class first.
  • Missing the negative. If the sentence contradicts the plain meaning of the stem, a negative is likely.
  • Forgetting the plural or the participle. Check what the words around the gap need.
  • Spelling slips. A misspelt correct word scores zero.
  • Two answers. Cambridge tells candidates not to give alternative answers for one question.

A few gaps accept two forms. In the practice keys below, where two words are listed, either is accepted.

How should I practise word formation?

Learn word families in sets of five: verb, noun, adjective, adverb and negative form. Do one Part 3 text, then for every gap you missed write the stem, the word class the sentence needed and the clue that showed it. After three days, cover your log and rebuild the word families from the stems alone.

Where can I try C1 Advanced word formation practice items?

Practice items from the ScoreFluent bank (not real exam questions)

Each bold gap shows its number and the stem word. Write the correct form, then open the answer key.

Item 1: Scanning the century

The national library has begun the [1 MONUMENT] task of scanning its entire collection of newspapers. Archivists say the project is [2 EXCEPTION] urgent, since the pulp paper used a century ago is crumbling. Researchers will soon enjoy [3 LIMIT] access to material that was previously available only in a reading room in the capital. However, the machines cannot read faded print [4 ACCURATE], and volunteers are needed to correct their errors. The library hopes that [5 PARTICIPATE] by the public will [6 HEIGHT] awareness of its holdings. Yet some historians remain [7 CERTAIN] about whether digital files will last as long as paper, a question of [8 DURABLE] that no technician can yet answer.

Answer key and why
  1. MONUMENT becomes monumental. An adjective meaning "enormous" is needed before "task": monument becomes monumental.
  2. EXCEPTION becomes exceptionally. An adverb is needed to modify the adjective "urgent": exception becomes exceptionally.
  3. LIMIT becomes unlimited / limitless. An adjective meaning "without restriction" is needed before "access": limit becomes unlimited (limitless is also acceptable).
  4. ACCURATE becomes accurately. An adverb is needed to modify the verb "read": accurate becomes accurately.
  5. PARTICIPATE becomes participation. A noun is needed after "that" and before "by the public": participate becomes participation.
  6. HEIGHT becomes heighten. A verb is needed after "will": height becomes heighten.
  7. CERTAIN becomes uncertain. A negative adjective is needed after "remain" and before "about whether": certain becomes uncertain.
  8. DURABLE becomes durability. A noun is needed after "a question of": durable becomes durability.

Item 2: Roll the dice again

Board games, once dismissed as childish, have enjoyed a remarkable [1 REVIVE] in recent years. Cafés where customers play for hours now operate in most large towns, and conventions attract [2 THOUSAND] of enthusiasts. Designers say the appeal lies in the [3 PERSON] contact that screens cannot offer. Modern games are also more [4 IMAGINE] than their predecessors, with rules that reward cooperation rather than pure luck. Publishers have been [5 WILL] to respond, and several new titles appear every week. Some collectors spend [6 STAGGER] sums on rare editions, though most players prefer to buy affordable copies. Teachers, meanwhile, praise games for developing [7 SOCIETY] skills such as negotiation. Whether the boom will last is [8 KNOW], but sales have so far shown no sign of slowing.

Answer key and why
  1. REVIVE becomes revival. A noun is needed after "a remarkable": revive becomes revival.
  2. THOUSAND becomes thousands. A plural noun is needed before "of enthusiasts": thousand becomes thousands.
  3. PERSON becomes personal. An adjective is needed before "contact": person becomes personal.
  4. IMAGINE becomes imaginative. An adjective is needed after "more": imagine becomes imaginative.
  5. WILL becomes willing. An adjective is needed after "have been" and before "to respond": will becomes willing.
  6. STAGGER becomes staggering. A participial adjective is needed before "sums": stagger becomes staggering.
  7. SOCIETY becomes social. An adjective is needed before "skills": society becomes social.
  8. KNOW becomes unknown. A negative participle is needed after "is": know becomes unknown.

Item 3: Dust of the deep

Scientists now find tiny fragments of plastic in [1 LIKELY] places, from deep ocean trenches to mountain snow. These microplastics come from many sources, including synthetic clothing, car tyres and the [2 DEGRADE] of larger items. Their small size makes them [3 PRACTICAL] to filter out. Researchers have begun to examine the effect on [4 MICROSCOPE] organisms, which swallow the particles and pass them up the food chain. The long-term consequences for human health remain [5 CLEAR], though early studies point to inflammation. Some countries have [6 LAW] the use of plastic microbeads in cosmetics, a step campaigners describe as [7 COMMEND] but insufficient. The real challenge lies in changing the [8 CONSUME] habits of the wider public.

Answer key and why
  1. LIKELY becomes unlikely. A negative adjective is needed before "places": likely becomes unlikely.
  2. DEGRADE becomes degradation. A noun is needed after "the" and before "of larger items": degrade becomes degradation.
  3. PRACTICAL becomes impractical. A negative adjective is needed after "makes them": practical becomes impractical.
  4. MICROSCOPE becomes microscopic. An adjective is needed before "organisms": microscope becomes microscopic.
  5. CLEAR becomes unclear. A negative adjective is needed after "remain": clear becomes unclear.
  6. LAW becomes outlawed. A past participle is needed after "have": law becomes outlawed.
  7. COMMEND becomes commendable. An adjective is needed after "as": commend becomes commendable.
  8. CONSUME becomes consumer / consumption. A noun used as a modifier is needed before "habits": consume becomes consumer (consumption is also acceptable).

How does ScoreFluent practise this part?

The C1 Advanced Reading and Use of English sectional mock test and the full mock test include this task. Results are practice estimates, not official Cambridge scores. New accounts get 40 free credits and credits never expire. There is no subscription, and reading practice is free within a daily limit (pricing). Start with 40 free credits →

Where next: the C1 Advanced hub, the Reading and Use of English guide, the full list of C1 task guides and how C1 Advanced is scored.

Where did these facts come from?

Checked 15 and 16 October 2026. ScoreFluent is not affiliated with or endorsed by Cambridge University Press & Assessment. The practice items above come from ScoreFluent's own bank and are not real exam questions.

Questions students ask

How many gaps are there in C1 Advanced word formation?

Eight, each worth one mark. Each gap has a stem word in capital letters, which you change to fit the sentence.

What does word formation test?

Mainly vocabulary, in how prefixes, suffixes, internal changes and compounds make new words, plus the grammar needed to choose the right word class. Cambridge says it may also need understanding of the text beyond the sentence.

Will there be a negative prefix in word formation?

Cambridge's handbook says there is usually at least one word needing a negative prefix in each Part 3 task, so check for un-, in-, im-, dis- and similar prefixes.

Can the answer be a plural noun or a particular verb form?

Yes. The handbook says a plural form or a specific part of a verb is sometimes required, so read the words around the gap before you choose the ending.

Does spelling matter in word formation?

Yes. Cambridge says spelling must be correct in all parts of Use of English, and a misspelt word loses the mark. American spelling is accepted if you stay consistent.

Does word formation count towards Reading or Use of English?

Use of English. Cambridge bases that score on Parts 2, 3 and 4, and bases the Reading score on Parts 1, 5, 6, 7 and 8.

Do I lose marks for a wrong answer in word formation?

No. A wrong or blank answer scores zero, with no negative marking, so write something in every gap.

Can I give two forms if I am unsure?

No. Cambridge tells candidates not to write more than one answer for a question, even if they think two are possible, so choose one form.

How do I practise word formation?

Learn word families together: noun, verb, adjective, adverb and the negative form. For each gap you miss, write the word class that the sentence needed and the clue that showed it.

Are the practice texts on this page real C1 Advanced questions?

No. They are ScoreFluent practice items, and ScoreFluent is not affiliated with Cambridge University Press & Assessment. Practice results are estimates, not official Cambridge scores.

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