The diagrams below show a structure that is used to generate electricity from wave power.
Sample Response
The diagrams illustrate how electricity generates with the help of wave power.
Overall, wave plays the important role and turbine moves, generating electricity, and the whole structure is connected with cliff or sea wall.
As can be seen from the first picture, the chamber plays a significant part in the whole process in which Wave come and go. When the wave comes I the chamber, the flow of the wave creates air pressure. Then, a turbine in the column move roundly and then air go out from the then wide-open head of the column. When the turbine moves, it generates electricity. The whole structure of this process is built on a cliff or sea wall.
With regard to the next diagram, Air comes from the upper side of the column, which again circulate the turbine in the same direction. Air moves in the down direction. After that, by this motion turbine which also creates electricity. Eventually, the wave goes back to sea.
IELTS Writing Correction
- 1. Use the passive form Original: electricity generates Suggested revision: electricity is generated Why it matters: Electricity receives the action in this process, so a passive verb is required.
- 2. Use concise wording Original: with the help of Suggested revision: using Why it matters: Using states the mechanism more directly in a process description.
- 3. Fix the plural subject Original: wave plays Suggested revision: waves play Why it matters: Wave needs a plural form when referring generally to repeated wave action.
- 4. Fix the article Original: the Suggested revision: an Why it matters: An indefinite article is required because no uniquely defined role has been introduced.
- 5. Describe turbine action Original: and turbine moves Suggested revision: and the turbine rotates Why it matters: Rotate is the precise verb for the turbine's movement, and turbine needs an article.
- 6. Describe the location Original: connected with cliff or sea wall Suggested revision: built into a cliff or sea wall Why it matters: The diagram shows the structure installed within the cliff or sea wall rather than merely connected to it.
- 7. Fix agreement and wording Original: Wave come and go Suggested revision: waves enter and leave Why it matters: The plural subject needs waves, and enter and leave describe movement through the chamber clearly.
- 8. Correct the preposition Original: comes I the chamber Suggested revision: enters the chamber Why it matters: The original phrase contains a typo and needs a transitive verb for movement into the chamber.
- 9. Name the incoming wave Original: flow of the wave Suggested revision: incoming wave Why it matters: Incoming wave describes the stage more concisely and precisely.
- 10. Use the correct verb Original: move roundly Suggested revision: rotates Why it matters: Rotates is the standard verb for circular turbine movement.
- 11. Fix subject-verb agreement Original: go Suggested revision: goes Why it matters: The uncountable singular subject air takes the verb goes.
- 12. Name the outlet clearly Original: then wide-open head Suggested revision: open top Why it matters: The diagram shows air leaving through the open top of the column.
Suggested Rewrites
- electricity generates electricity is generated
- with the help of using
- wave plays waves play
- the an
- and turbine moves and the turbine rotates
- connected with cliff or sea wall built into a cliff or sea wall
Why this response received Band 6.0
The response successfully follows the two operating phases and identifies the chamber, airflow, turbine, and electricity generation, so the essential process is covered. Its main limitation is frequent grammatical and lexical awkwardness, which makes several stages less precise than the diagram. The highest priority is to explain the rising and retreating wave phases in clear cause-and-effect sentences, emphasising that opposite airflow keeps the turbine turning in the same direction.
IELTS Writing Criteria Scores
Task Achievement
The main components and both airflow phases are described accurately, although the overview and causal explanation lack full precision.
Give a clearer overview that the incoming and retreating waves create opposite airflow while the turbine continues rotating in one direction.
Coherence and Cohesion
The response follows the diagram from the incoming wave to the returning wave, but some linking is mechanical and local progression becomes unclear.
Use one paragraph for each phase and connect every stage explicitly with cause-and-effect links such as as a result and this draws air downward.
Lexical Resource
Relevant process vocabulary is present, but awkward collocations and imprecise expressions occur frequently.
Use precise combinations such as enters the chamber, forces air upward, rotates the turbine, and is drawn back toward the sea.
Grammatical Range and Accuracy
Complex structures are attempted, but frequent agreement, article, word-form, and sentence-formation errors reduce control and clarity.
Build each stage with a complete subject-verb clause and systematically check singular agreement, articles, and passive forms.
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IELTS Academic Writing Task 1
The diagrams below show a structure that is used to generate electricity from wave power.
Your response
Write the task yourself, then compare your choices with the annotated response.