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)

diagram show how ethanol is produced which collect from corn .

First step is ti harvesting of trees and plantes that cobtain sunlight and corbandioxide.After completing the process of harvesting ,the trees and plantes were cut off from machine. after the cutting all these plantes and tress and getting cellulose form these all these stuff such as which got from plants and trees were send to laboratry..

after this process of processing in laborarty the product which we gain is sugars. Than adding some others microbes which react with sugar and the product which had ganed from this process is ethanol.

Compeleting the process of making ethanol, than all these workers put in the hole ethanol in different types of cars, trucks and in areoplane as well. Which they arrived in different country after taking all the ethanol. Ita also get from corns

AI examiner evaluation

Task Achievement / Task Response: Band 4.0

You identify the general subject and mention several relevant stages, including harvesting, cellulose, sugars, microbes and ethanol. However, the account is incomplete and contains important inaccuracies: the diagram does not say the plants are corn, and it does not show workers transporting ethanol to other countries. It also omits the key cycle in which ethanol is used by cars, trucks and aircraft, releasing carbon dioxide that returns to support plant growth. There is no clear overview of the process as a cycle, and some stages are difficult to interpret. The response is also below the required 150 words. To improve, describe the full sequence accurately and summarise the circular relationship between plant growth, fuel use and carbon dioxide.

Coherence and Cohesion: Band 5.0

The response follows a broadly chronological order, moving from harvesting through processing to ethanol and its use in transport. Connectors such as “after this process” and “than” show an attempt to guide the reader through the stages. However, the writing is presented as one paragraph, and progression becomes unclear where ideas are repeated or joined awkwardly—for example, “after the cutting all these plantes and tress and getting cellulose form these all these stuff.” The final comments about transport and corn also disrupt the sequence rather than completing the cycle. Use separate paragraphs for an overview and the main stages, and connect each stage with precise transitions such as “Next” and “Finally.”

Lexical Resource: Band 5.0

You use some task-related vocabulary, including “harvesting,” “cellulose,” “sugars,” “microbes” and “ethanol,” which helps communicate the basic subject. However, the range is limited and several word choices or spellings make the description difficult to follow, such as “laboratry,” “corbandioxide” and “hole ethanol.” Some phrases are also imprecise for a process diagram: “put in the hole ethanol” does not clearly explain that ethanol is used as fuel, while “different country” introduces an unsupported idea. Aim for accurate process vocabulary and check spelling carefully. More precise terms such as “is converted into,” “is then processed” and “is used as fuel” would make the stages clearer.

Grammatical Range and Accuracy: Band 4.5

You attempt to link stages in longer sentences, but sentence structures are often incomplete or faulty, and errors frequently make relationships between steps unclear. For example, “diagram show how ethanol is produced which collect from corn” lacks a clear subject–verb structure, while “After completing the process of harvesting, the trees and plantes were cut off from machine” has an unclear construction and inconsistent tense. Articles, agreement and punctuation also need attention, as in “in laborarty” and the run-on sequence beginning “after the cutting.” Use mostly clear present-simple sentences to describe a process, with passive forms where appropriate: “The plants are harvested and pre-processed.” Then check that each sentence has a subject and a main verb.

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