Band 4.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.0 · Cambridge IELTS 19 · 2026-08-15

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 process diagram illustrate the different stages of producing ethanol from scratch to useful in various type of vehicles.

Overall, it is clear that first plants and trees were harvested and than passed on to the next stage for pre-processing where cellulose extracted in laboratary with the use of chemical to produce final product which then available for commercial usage.

Regrading first stage, corps were grown with the help of two natural resources (sunlight and carbon dioxde). After that

AI examiner evaluation

Task Achievement / Task Response — Band 3.0

The response is significantly under the 150-word minimum requirement, which severely limits the ability to address the task. The summary is incomplete, as it stops abruptly after describing only the initial stages of the process. Because the response is unfinished and fails to report on the entire diagram, it does not provide a clear overview or a complete summary of the main features. To improve, you must ensure you describe all stages of the process shown in the diagram and meet the minimum word count to allow for a full development of the information.

Coherence and Cohesion — Band 4.0

The text is too short to demonstrate effective paragraphing or a logical progression of ideas. While there is an attempt to use cohesive devices like 'Overall' and 'Regarding', the abrupt ending prevents the development of a coherent structure. The flow of information is interrupted, making it difficult to follow the process from start to finish. To improve, focus on structuring your response into clear paragraphs: an introduction, an overview, and body paragraphs that logically sequence the steps of the process using a variety of linking words.

Lexical Resource — Band 4.0

The vocabulary used is basic and contains several errors, such as 'laboratary' (spelling) and 'corps' (likely meant 'crops'). The range is limited, and the phrasing is often awkward, such as 'from scratch to useful in various type of vehicles'. There is little evidence of the ability to use less common vocabulary or precise terminology related to industrial processes. To improve, focus on learning topic-specific vocabulary related to diagrams and processes, and ensure you check your spelling carefully before submitting.

Grammatical Range and Accuracy — Band 4.0

There are frequent grammatical errors throughout the short text. Examples include 'The process diagram illustrate' (subject-verb agreement), 'than passed' (incorrect word choice for 'then'), and 'which then available' (missing verb). The sentence structures are simple and often incomplete. To improve, pay closer attention to basic subject-verb agreement and ensure that every sentence contains a main verb. Practicing the use of passive voice is also essential for describing processes, as it helps to maintain a formal and objective tone.

See this exact question answered at other band scores — the same prompt compared across bands.

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