Band 4.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.0 · IELTS Momentum Workout · 2026-10-14

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)

Mechanical arm works same as human beign arm works .It also have similar joints just like human .It have a base that is moveable not stationery.It also have a shoulder that give supports to things. It also have pivotr tha enables to rotate or circular motion. It also have a wrist that grip loads.it have elbow for movemnent. it also have compouter that monitor ior control functions.So, it have all chracteristics like human arm that they help in circular motion, holding things, have felxibility and endure pressure.

AI examiner evaluation

Task Achievement / Task Response: Band 4.0

The response identifies several relevant parts, including the base, pivot, shoulder, wrist, elbow and computer, and gives a basic overall comparison with a human arm. However, it only minimally summarises the diagram: it does not explain how the computer controls the motors or describe the arm’s arrangement and operation in a clear sequence. Some details are inaccurate or unsupported: the base is described as movable, although it is usually stationary and only occasionally movable, and the wrist is said to grip loads rather than allow the gripper to flex or rotate. The alternative end-effectors are omitted. The response is also 63 words below the required minimum, leaving the main features substantially underdeveloped. Include an overview and explain the key functions accurately.

Coherence and Cohesion: Band 4.0

The response stays broadly on the topic and mentions several components, but the information is presented as a string of short, similar statements rather than as a logically organised summary. Repeated openings such as “It also have” make the progression mechanical, and the final sentence (“So, it have all chracteristics…”) does not clearly synthesise the diagram’s main information. There is no clear separation between an overview and supporting details, nor a sequence showing how the base, joints, motors and end-effector relate. Group the information into an overview followed by connected details about the structure and functions, and use clear references such as “these joints” to link ideas.

Lexical Resource: Band 4.5

The response uses a small set of relevant terms, including “base,” “shoulder,” “pivot,” “wrist,” “elbow” and “circular motion,” so the reader can recognise the general subject. However, vocabulary is basic and repetitive, and several spelling and word-choice errors make the description less clear, including “beign,” “pivotr,” “compouter,” “chracteristics” and “felxibility.” Some phrases are also imprecise: “wrist that grip loads” does not convey the wrist’s function, while “shoulder that give supports to things” is vague. Use the diagram’s precise functional language, such as “raises and lowers the arm,” “allows rotation,” and “controls the force applied by the gripper,” and check spelling carefully.

Grammatical Range and Accuracy: Band 4.0

Most sentences follow a simple subject–verb pattern, and the repeated structure makes the basic meaning partly understandable. However, the range is very limited, and frequent errors affect agreement, articles, verb forms and punctuation. For example, “It also have a base” should be “It also has a base,” while “a shoulder that give supports” needs “a shoulder that provides support.” The opening sentence has faulty construction and spacing (“Mechanical arm works same as human beign arm works”), and the final sentence contains several clauses joined without clear grammatical control. Practise accurate simple sentences first, then combine related information with clauses such as “which allows…” or “while…”; also use full stops and capital letters consistently.

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.