IELTS grammar: Passive Voice

Passive voice sits inside Grammatical Range and Accuracy as a structure examiners specifically look for evidence of controlled, deliberate use of, and the reason it matters so much for scoring is that it splits candidates into two error-prone camps rather than one. Some candidates avoid passive voice almost entirely, producing essays with a narrow grammatical range that never demonstrates the structure at all; others overuse it, producing essays where every sentence follows the same "was + past participle" pattern regardless of whether passive voice actually suits the content, which reads as mechanical rather than sophisticated. The actual skill being tested is judgment about when passive voice serves the sentence better than active voice does, not passive voice as a box to tick.

Passive voice is formed with a form of "be" plus a past participle, and it shifts the sentence's focus from who performs an action to what happens to something: "The bridge was built in 1990" foregrounds the bridge, not the unnamed builders, whereas "Workers built the bridge in 1990" foregrounds the workers. Neither version is inherently better — the choice depends entirely on which part of the information matters more to the sentence's purpose.

Passive voice is genuinely the stronger choice in Academic Task 1 when describing a process, especially a diagram of stages, because the agent performing each step is usually unnamed, irrelevant, or too generic to state naturally: "The raw material is transported to the factory, where it is processed, packaged, and distributed to retailers." Rewriting this in active voice forces an awkward invented subject: "Someone transports the raw material to the factory, where someone processes, packages, and distributes it" — clearly worse, because naming an unspecified "someone" adds no information and reads unnaturally. This is the clearest, least controversial case for using passive voice, and Task 1 process descriptions are the single strongest place to demonstrate it.

Passive voice also suits Task 2 sentences about policy, law, or societal-level action where naming a specific actor would be either awkward, unknown, or beside the point: "Stricter emissions regulations should be introduced within the next five years" reads more naturally than the invented active-voice subject in "Someone should introduce stricter emissions regulations," and it also matches the objective, slightly formal register Task 2 rewards over a more conversational alternative. A related, more advanced use is deliberately foregrounding the receiver of an action to keep a paragraph's topic consistent across sentences: "The proposal was criticised by several committee members. It was eventually withdrawn after further review." Keeping "the proposal" as the grammatical subject across both sentences, via passive voice, produces smoother cohesion than switching to "several committee members criticised the proposal" and then needing a new subject for the second sentence.

The clearest overuse error is defaulting to passive voice across an entire essay regardless of content, which produces two separate problems: the writing reads as stiff and repetitive, and it can obscure who is actually responsible for an action in a way that sometimes weakens an argument rather than strengthening it. INCORRECT (representative of overuse, not a single sentence but a pattern): "It is believed that this problem is caused by several factors. It should be noted that solutions have been proposed by various experts. It can be argued that action must be taken." Every sentence here defaults to passive without a clear reason, and the effect is a wall of vague, agentless claims rather than a specific, developed argument. The well-known phrase "mistakes were made" is the textbook example of passive voice used specifically to avoid naming who is responsible, and Task 2 essays that lean on this pattern throughout tend to read as evasive rather than as demonstrating sophisticated range.