Band 4.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.0 · IELTS Momentum Workout · 2026-09-22

IELTS Writing Task 1 question

The diagram below shows how a mechanical arm works, and how the joints that make up the arm function in the same way as those in a human arm. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Student answer (Band 4.0)

This diagram provides the information about the tool that helps to make the daily works easier. Overall, there is a whole step by step guidance about the manufacturing of gadget.

If we divide it into some sections then we have its base on the first number which is moveable. It is foundation of that specific tool and a motor to make it work properly. . Moving to the next part we have the other section which includes its shoulder which has specific functioning of moving the whole upper part like human arm. then it is connected to pivot which makes it to happen successfully. just upper from that there is a elbow which increases the flexibility of its movement and a motor is attachedwith it which has access to computer and control all motors in that perticular tool and then a rod that connects the elbow and the gripper which is has pre-build sensors control force. Along with gripper we have another motor attached to it which allow to make the movements possible. All after that we have to paint it or weld it to ensure whether it is strong enough or not

AI examiner evaluation

Task Achievement / Task Response — Band 4.0

The response attempts to describe the mechanical arm diagram, but it misinterprets the core subject, describing it as a manufacturing gadget rather than a mechanical arm with human-like joints and alternative end-effectors. The overview is weak and imprecise, mentioning 'step by step guidance about the manufacturing of gadget' instead of summarising the main features of the arm's structure and functions. While some components like the base, shoulder, elbow, pivot, and gripper are mentioned, details are confused and lack clear comparative reporting. Consequently, key information regarding how motors control precision and how alternative end-effectors function is muddled. This meets the criteria for Band 4.0 as it responds to the task minimally and contains significant misinterpretations.

Coherence and Cohesion — Band 4.0

The essay lacks proper paragraphing, presented mostly as a single block of text with a brief initial sentence split off awkwardly. Cohesive devices are repetitive and basic (e.g., 'Moving to the next part', 'then it is connected', 'All after that'). The logical progression is difficult to follow because sentences run into one another with punctuation errors, such as double periods ('.. Moving') and run-on structures. Reference pronouns are often ambiguous, making it hard to determine what 'it' or 'they' refers to. These issues restrict the response to Band 4.0, as information and ideas are not arranged coherently or with clear overall progression.

Lexical Resource — Band 4.0

Vocabulary is basic and repetitive, frequently relying on simple terms like 'tool', 'part', 'section', and 'work'. There are noticeable word choice and collocation errors, such as 'daily works', 'manufacturing of gadget', 'just upper from that', and 'pre-build sensors control force'. Spelling and word formation are occasionally inaccurate. While the student attempts to use terminology from the prompt (e.g., 'shoulder', 'elbow', 'gripper', 'pivot'), the limitations in lexical control and frequent inaccurate phrasing result in a Band 4.0 rating.

Grammatical Range and Accuracy — Band 4.0

The text contains a very limited range of structures, heavily relying on basic coordinate clauses strung together with conjunctions. There are frequent grammatical errors, including missing articles ('a elbow', 'to computer'), incorrect prepositions ('attachedwith'), awkward word order ('has pre-build sensors control force'), and tense/verb agreement issues. Punctuation is faulty, featuring run-on sentences and double punctuation marks. Because errors are frequent and often cause difficulty for the reader, the response aligns with Band 4.0.

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.