Band 4.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 4.0 · Cambridge IELTS 19 · 2026-09-27
IELTS Writing Task 1 question
The diagram below shows how a biofuel called ethanol is produced.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
Student answer (Band 4.0)
The diagram illustrates that a biofuel called ethanol is produced.
Overall,the energy and sunlight effect on the trees.And the farmer costing crops.So,the pre-processing in to the cellulose.However the processing the sugars.In addition to the microbes added and releas the ethanol.
First of all,the sun energy and sunlight addition to carbon dioxide effect on the plants and trees.So,the plants and trees grow.And the farmer costs the crops.This figure highly difficult.However,harvesting to the pre-processing and make it cellulose.The cellulose processing the sugars.
Second of all,the sugars made it ethanol.So,the ethanol release the carbon dioxide.This figure highly difficult.The carbon dioxide walking in the airs.And effect on the humans.So,the biofuel production is not easy.And the made is ethanol highly difficult.
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 4.0 |
| Coherence and Cohesion | 4.0 |
| Lexical Resource | 4.0 |
| Grammatical Range and Accuracy | 4.0 |
| Overall | 4.0 |
Task Achievement / Task Response: Band 4.0
The response fails to meet the minimum word count requirement of 150 words, containing only 116 words, which negatively impacts the overall task achievement score. Regarding the content, the student attempts to describe the process of ethanol production from plants and trees, but the overview and descriptions are extremely fragmented and fail to clearly report the main features or stages of the cycle in a coherent manner. Phrases like 'This figure highly difficult' do not accurately or appropriately summarize the visual data. Key stages such as pre-processing, conversion into cellulose, addition of sugars and microbes, and the release of carbon dioxide are mentioned very disjointedly, leading to an incomplete and underdeveloped response that aligns with Band 4.0 descriptors.
Coherence and Cohesion: Band 4.0
The response is organized into short paragraphs, including an introduction and two body sections, but the logical progression and overall coherence are severely disrupted. Sentences are frequently disjointed, telegraphic, and lack proper semantic connections. For example, transitions like 'First of all, the sun energy and sunlight addition to carbon dioxide effect on the plants and trees' and 'Second of all, the sugars made it ethanol' demonstrate mechanical and faulty cohesion. Pronoun referencing and connective phrasing are frequently absent or misused, resulting in an arrangement of ideas that is difficult for the reader to follow. Paragraphing is attempted, but the internal logical links within paragraphs are weak, supporting a Band 4.0 score.
Lexical Resource: Band 4.0
The vocabulary used is very basic, repetitive, and heavily reliant on direct copying of labels from the prompt (e.g., 'pre-processing', 'cellulose', 'sugars', 'microbes added', 'ethanol', 'carbon dioxide'). There are numerous word choice and word formation errors throughout the text, such as 'the farmer costing crops' instead of harvesting crops, and 'release the ethanol' where inappropriate verbs are deployed. The range of vocabulary is extremely limited and inadequate for discussing a technical process diagram. Frequent inaccuracies in collocation and lexical form cause strain for the reader, placing the response firmly in the Band 4.0 category.
Grammatical Range and Accuracy: Band 4.0
The grammatical range is very restricted, consisting primarily of fragmented or simple sentence structures that are frequently incomplete or grammatically non-standard. There is an absence of successful complex structures. Numerous serious grammatical errors occur throughout the text, including missing verbs, incorrect prepositions, and faulty verb forms (e.g., 'the energy and sunlight effect on the trees', 'the pre-processing in to the cellulose', and 'the carbon dioxide walking in the airs'). These frequent errors impede communication and distort meaning in several places, reflecting the characteristics of a Band 4.0 performance.
See this exact question answered at other band scores. The same prompt compared across bands.
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