Band 4.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.5 · Cambridge IELTS 19 · 2026-10-12

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)

The diagrame illustrate what a processing steep of biofuel called ethanol is made.

Overall, firstly starting from energy after that grow plants and trees,cut harvesting put production in pre-processing than output is cellulose and again in processing add the sugars its became microbes added after that its made ethanol.

Firstly, when biofuel production to made ethanol there are some steep,However first steep is energy like sunlight,carbon and dioxide after that grow plants and trees, doing harvesting steep 2 put in pre-processing out put coming cellulose, steep 3 - include in chemical processing and output coming out is sugars its is crucial part of made ethanol produced. Moverover, Added some microbes it is help to made ethanol.

On the others, when ethanol is uncomplete include some more carbone dioxide like care, track, airplane its benefity for complety made ethanol.its like a part of earth like round of process.

AI examiner evaluation

Task Achievement / Task Response: Band 5.0

You identify the subject as ethanol production and include several relevant stages, from plant growth and harvesting through pre-processing, cellulose, processing, sugars and microbes. You also attempt to describe the cycle involving transport and carbon dioxide. However, the account only partially covers the diagram: the overview is unclear, and the final stages are misinterpreted when you say carbon dioxide from vehicles helps ethanol to be completed. In the diagram, ethanol is used by cars, trucks and aircraft, which release carbon dioxide that returns to support plant growth. The process description is also limited and does not clearly explain this cycle. The response is 147 words, below the required 150. A clearer overview and accurate explanation of the carbon-dioxide loop would make the report more complete.

Coherence and Cohesion: Band 4.5

There is some basic organisation: the response has an opening, a general summary and two body paragraphs, and it broadly follows the production stages in sequence. This gives the reader a starting point for following the process. However, progression is often difficult to track because ideas are joined in long, unclear strings, as in “after that grow plants and trees, doing harvesting steep 2 put in pre-processing.” Linking expressions such as “after that,” “firstly” and “moreover” are repeated or do not show the relationship accurately. The final paragraph also shifts abruptly to the transport cycle without clearly connecting it to the earlier stages. Use one concise overview followed by clearly ordered stages, and make each sentence express one step or relationship.

Lexical Resource: Band 4.5

You use some relevant process vocabulary, including “harvesting,” “pre-processing,” “cellulose,” “sugars,” “microbes” and “ethanol,” which helps identify the main stages. However, the range is limited and several word choices or collocations make the meaning difficult to understand. For example, “processing steep” and “output coming out” are imprecise, while “its benefity for complety made ethanol” does not clearly describe the role of transport or carbon dioxide. There are also noticeable spelling and word-form errors, including “diagrame,” “steep” for “step,” and “carbone.” Aim for accurate process terms and natural combinations such as “the next stage,” “is converted into,” and “carbon dioxide is released.”

Grammatical Range and Accuracy: Band 4.5

The response attempts to describe a sequence and uses some simple clauses, but the range of sentence structures is limited. Many sentences contain frequent errors that make relationships between stages hard to follow. For instance, “The diagrame illustrate what a processing steep of biofuel called ethanol is made” has problems with subject–verb agreement, sentence structure and the passive form. In “when biofuel production to made ethanol,” the verb pattern is incomplete, and several clauses lack clear subjects or finite verbs. Punctuation and spacing are also inconsistent, particularly where sentences run together. Practise accurate present-simple process descriptions, including forms such as “plants grow,” “the material is processed,” and “microbes are added,” then build longer sentences only when the grammatical links are secure.

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

Browse more IELTS Writing model answers or get your own writing scored by the same AI examiner.