Choose the best option to complete each sentence, then check your answers.
The cognitive development of children can be ___ affected if they are continually exposed to high levels of stress during early childhood.
The gap requires an adverb to modify the passive verb phrase 'be affected'. 'Adversely' is the correct adverbial form, whereas 'adverse' is an adjective and 'adversity' is a noun.
The rapid ___ of small business operations across international markets has driven significant economic growth in developing regions.
The noun phrase starting with 'The rapid' requires a head noun before the preposition 'of'. 'Expansion' is the correct noun form, while 'expansive' and 'expandable' are adjectives.
The council concluded that the proposed coastal resort was ecologically ___ due to its proximity to vulnerable marine sanctuaries.
Following the linking verb 'was' and the adverb 'ecologically', a predicate adjective is required. 'Indefensible' is the correct adjective form, whereas 'indefensibly' is an adverb and 'indefensibility' is a noun.
The pharmaceutical company was required to conduct further clinical trials after the drug showed ___ high levels of toxicity during initial testing.
An adverb is required to modify the adjective 'high'. 'Disproportionately' is the adverbial form; 'disproportionate' is an adjective and cannot modify another adjective directly.
While the software update promises improved speed, some user interface changes have caused widespread ___ among long-time subscribers.
The verb 'caused' takes a direct object, which must be a noun phrase modified by the adjective 'widespread'. 'Dissatisfaction' is the required noun, whereas 'dissatisfied' is an adjective and 'dissatisfy' is a verb.
Sociologists argue that urban development must prioritize community welfare over purely economic ___ if city centers are to remain livable.
The preposition 'over' takes a noun phrase modified by the adjectives 'purely economic'. 'Considerations' is the correct plural noun form, while 'considerable' is an adjective and 'considerably' is an adverb.
The auditors revealed that the firm had failed to maintain an ___ accounting system, leading to severe discrepancies in the annual report.
The indefinte article 'an' and the compound noun 'accounting system' require an modifying adjective starting with a vowel sound. 'Acceptable' is the correct adjective, whereas 'acceptably' is an adverb and 'acceptance' is a noun.
The research team was criticized for relying on ___ evidence rather than empirical data gathered through controlled laboratory testing.
The noun 'evidence' must be modified by an adjective. 'Anecdotal' is the required adjective form; 'anecdotally' is an adverb and 'anecdote' is a noun.
Strict regulatory measures were introduced to prevent the ___ distribution of copyrighted material across peer-to-peer networks.
The noun 'distribution' requires an adjective modifier to complete the noun phrase 'the ... distribution'. 'Unauthorized' is the participial adjective fitting the context, whereas 'authorization' is a noun and 'authorize' is a verb.
The government has pledged to increase its investment in renewable energy, citing the growing ___ of fossil fuels as a primary concern.
The structure 'the growing ___ of' requires a noun as the head of the noun phrase. 'Unsustainability' is the correct noun form; 'unsustainable' is an adjective and cannot serve as a noun head here.
Public health officials emphasized that the campaign would be largely ___ unless local authorities actively engaged with community leaders.
Following the modal verb phrase 'would be' and the modifying adverb 'largely', a predicate adjective is required. 'Ineffective' is the adjective form, whereas 'ineffectively' is an adverb and 'ineffectiveness' is a noun.
The discovery of ancient trade artifacts provided ___ proof that the two civilizations had interacted centuries earlier than previously believed.
The noun 'proof' requires an adjective modifier. 'Irrefutable' is the correct adjective form; 'irrefutably' is an adverb and 'irrefutability' is a noun.
Because the manuscript was written in an obscure ancient dialect, scholars found it ___ difficult to translate without contextual clues.
In the structure 'found it [adverb] [adjective]', the adjective 'difficult' must be modified by an adverb. 'Immensely' is the correct adverb, whereas 'immense' is an adjective.
Engineers stressed that any minor ___ in the structural integrity of the aircraft frame could result in catastrophic failure.
The determiner 'any' and adjective 'minor' must modify a noun. 'Imperfection' is the correct abstract noun, whereas 'imperfect' is an adjective and 'imperfectly' is an adverb.
The genetically modified crop demonstrated remarkable ___ against extreme drought conditions, yielding high returns despite rainfall deficits.
The verb 'demonstrated' takes a direct object modified by the adjective 'remarkable'. 'Resilience' is the correct noun form, whereas 'resilient' is an adjective and 'resiliently' is an adverb.
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Word formation is a crucial aspect of English grammar that tests your ability to transform root words into correct parts of speech—nouns, verbs, adjectives, and adverbs—using appropriate prefixes and suffixes. For Band 6.5 to 8.0 candidates, mastering word formation allows you to demonstrate precise control over academic vocabulary and sentence structure.
Across the IELTS exam, strong morphological awareness significantly improves your performance. In Writing Task 2 and Speaking, accurately converting words (such as changing an adjective to a nominalised noun) enhances your lexical resource and syntactic complexity. In Reading and Listening, recognizing base roots and derivative affixes enables quick decoding of complex academic texts and technical recordings.
This practice test presents 15 demanding, context-rich items focused on academic and professional themes. Each item requires you to identify the required part of speech and select the correctly formed word to complete the sentence accurately.
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