Band 4.5 IELTS Writing Task 1 Model Answer
Overall Band Score: 4.5 · Cambridge IELTS 19 · 2026-09-29
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 4.5)
In below diagram represent the production of biofuel in which the ethanol is made. There is a whole cycle starts from growing of plants and trees and it end with the use of ethanol in fuel vehicle in between the process is done with harvesting converted in cellulose it converted in ethanol with serval steps.
The very first steps starts from growing of plants and trees taking energy of sunlight and carbon dioxide and then it will harvested then next step is of pre processing from we get cellulose and then some chemical process will be done. By doing process the sugar will come.
On moving further steps we get microbes which will added in sugar and the ethanol is ready to use then it will use as fuel in vehicle then from vehicle the carbon dioxide will be released then it will mixed in air then the process will repeat as same
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 5.0 |
| Coherence and Cohesion | 4.0 |
| Lexical Resource | 4.0 |
| Grammatical Range and Accuracy | 4.0 |
| Overall | 4.5 |
Task Achievement / Task Response: Band 5.0
The response attempts to describe the process of ethanol production shown in the diagram, covering the main stages from plant growth to fuel usage and carbon dioxide absorption. However, the description is quite superficial and lacks precise selection and reporting of the key features. For instance, phrases like 'some chemical process will be done' are too vague to adequately report the technical steps in the diagram. Furthermore, the overview of the cyclical nature of the process is weak, as the student relies heavily on simple narration rather than a cohesive summary. While all parts of the prompt are touched upon, the lack of well-developed ideas and clear supporting details places this response at Band 5.0.
Coherence and Cohesion: Band 4.0
The text suffers from severe structural and organizational issues. The entire response consists of only three very long, run-on sentences with virtually no punctuation to separate distinct ideas or clauses. For example, the sentence starting with 'In below diagram represent...' links multiple disparate steps together without proper terminal punctuation or logical signposts. Although chronological sequencing words like 'first steps', 'then', and 'On moving further' are attempted, the overall arrangement lacks clear paragraphing and logical progression, creating a confusing reading experience. Cohesive devices are repetitive and mechanically applied, leading to a score of Band 4.0.
Lexical Resource: Band 4.0
The vocabulary used is basic and repetitive, frequently relying on simple terms such as 'process', 'things', and 'get'. There are noticeable lexical inaccuracies, such as 'In below diagram represent' instead of 'The diagram below illustrates', and 'microbes which will added' where grammatical form and word choice fail. Less common lexical items are rarely attempted successfully, and errors in word choice (e.g., 'harvested' used as a noun phrase component) occasionally cause difficulty for the reader. This corresponds to a Band 4.0 level for Lexical Resource.
Grammatical Range and Accuracy: Band 4.0
Grammatical control is weak throughout the response. The text is characterized by a complete absence of proper sentence boundaries, resulting in massive run-on sentences linked by comma splices and conjunctions like 'and then'. There are frequent errors in verb forms, voice, and subject-verb agreement, such as 'a whole cycle starts... and it end', 'it converted in ethanol', and 'microbes which will added'. Complex structures are attempted through passive voice and relative clauses, but they are consistently faulty. Due to the high frequency of basic grammatical errors that impede communication, the grammar score is Band 4.0.
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