Band 4.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 4.0 · Cambridge IELTS 19 · 2026-09-14
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 given chart illustrates the information of the process how a biofuel called ethanol is produced to make ethanol from sugarcane there are certain are follow.
To make ethanol from sugarcane there are five main step are follow such as harvesting, pre-processing, cellulose, processing, microbes and after these steps ethanol is produced.
There is an particular cahin which is followed to make sugar from sugarcane first step is harvesting farmer grow sugarcane and after harvest it second step is pre-processing in this process there is an machine in which juice is devide from cellulose in step is processing in this step cellulose is come into refineres and by the help of the chemicals this is purify in the next step we have liqued sugar in this time ethanol is produced but not fully in the last step add microbes to take perfect ethanol and in this time ethanol is produced and it is ready to use as biofuel.
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 attempts to outline the process of ethanol production from sugarcane as depicted in the diagram, identifying key stages such as harvesting, pre-processing, processing, and adding microbes. However, the overview is extremely weak and fails to clearly present the main features or make effective comparisons. Several stages are muddled and lack precise description, such as treating 'cellulose' as a standalone step rather than a material separated during pre-processing. While the student identifies most of the graphic's components, the lack of a coherent summary and under-developed reporting of the linear process restrict the response to Band 4.0, as information is presented minimally and somewhat confusedly.
Coherence and Cohesion — Band 4.0
The text suffers from significant organizational and cohesive issues. The response is divided into brief paragraphs, but the second and third paragraphs read more like run-on fragments than structured descriptions. Cohesive devices are either missing or misused, relying on repetitive phrases like 'in this step' and 'and in this time'. There is no clear logical progression or paragraphing strategy, making the sequence of steps difficult to follow smoothly. Referencing is frequently unclear, leading to confusion about which stage of the process is being described. These weaknesses correspond to a Band 4.0 for Coherence and Cohesion.
Lexical Resource — Band 4.0
The vocabulary used is very basic and repetitive, heavily relying on words directly lifted from the prompt or common everyday terms like 'machine', 'chemicals', and 'liquid sugar'. There are numerous word choice and word formation errors, such as 'cahin' instead of chain, 'devide' instead of divide, and 'liqued' instead of liquid. Less common lexical items are attempted but used inaccurately, such as treating process labels as standalone steps ('cellulose', 'microbes'). The limited range and frequent inaccuracies constrain the lexical score to Band 4.0.
Grammatical Range and Accuracy — Band 4.0
The grammatical structure of the response is heavily flawed, characterized by run-on sentences, comma splices, and fragments. For example, sentences such as 'To make ethanol from sugarcane there are five main step are follow such as harvesting, pre-processing, cellulose, processing, microbes and after these steps ethanol is produced' demonstrate severe structural breakdown and lack of control over basic clause boundaries. Subject-verb agreement errors are common, and complex sentence structures are attempted but fail grammatically. Frequent structural errors distort meaning and make parts of the text difficult to parse, supporting a Band 4.0 score.
See this exact question answered at other band scores — the same prompt compared across bands.
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