In academic writing, you often need to describe actions without emphasising who performed them. Causative structures let you do exactly that — they show that someone arranged for an action to happen or caused it to happen, without making the doer the focus of the sentence.

There are two main types you need to master.

'Have/get something done' (arranged actions)
When you want to say that someone arranged for another person to do something for them, use: subject + have/get + object + past participle. For example: *The university had its research findings reviewed by an external committee.* The university did not review the findings itself — it arranged for someone else to do it. This structure is extremely useful in academic writing when describing institutional processes, research methodology, or policy implementation. Note that 'get' is slightly more informal than 'have,' so prefer 'have' in essays.

'Make/have/let someone do something' (caused actions)
When you want to express that someone or something caused another person to act, use: subject + make/have/let + object + base verb. For example: *Rising unemployment made the government reconsider its economic policy.* After 'make,' 'have,' and 'let,' the verb that follows is always in its base form — never add 'to.' This is one of the most common mistakes students make, and examiners will notice it immediately.

A key distinction: causative structures are not the same as passive voice. Passive removes the agent entirely (*The report was written*), while causative keeps the causer as the subject (*The department had the report written*). If you need to show who arranged or caused the action, causative is the right choice.

For your IELTS or PTE score, causative structures demonstrate grammatical range because they combine multiple elements in a single clause. They are particularly powerful in process descriptions, policy discussions, and cause-effect arguments, helping you move towards Band 7 in Grammatical Range.

Comparatives in academic writing go far beyond 'X is bigger than Y.' Advanced comparative structures allow you to express cause-effect relationships, challenge assumptions, and build nuanced arguments — all of which signal sophisticated grammar to IELTS and PTE examiners.

'The more...the more' (double comparatives)
This structure links two changing quantities in a cause-effect chain. Both clauses begin with 'the,' followed by a comparative form: *The more governments invest in education, the stronger their economies become.* The first clause is the cause; the second is the effect. You can vary the comparatives: 'the more/less + adjective,' 'the more/less + noun,' or 'the + comparative adjective.' This structure is particularly effective in body paragraphs where you are arguing that one factor directly influences another.

'Not so much...as' (reframing)
When you want to challenge a common characterisation and offer a more accurate one, use 'not so much A as B': *Climate change is not so much an environmental problem as a political one.* This structure acknowledges what people typically think before redirecting to your own, more precise interpretation. It demonstrates critical thinking, which examiners reward in Task Response.

'No less...than' (asserting equal significance)
To argue that something is just as important as — or comparable to — something already valued, use 'no less...than': *The impact of social media on elections is no less significant than that of television advertising.* This structure is assertive without being absolute; it draws a parallel that strengthens your argument while maintaining academic caution.

A common pitfall with all these structures is omitting 'the' before each clause in double comparatives or using 'than' instead of 'as' with 'not so much.' Get the fixed patterns right, and these structures will significantly boost your Grammatical Range score, helping you move towards Band 7 and above.

Now that you can use causative structures and advanced comparatives independently, the next step is combining them within a single argument. Sophisticated academic writing rarely uses just one complex structure — it layers them to build dense, persuasive paragraphs.

Consider this sentence: *The more governments have their public services privatised, the greater the inequality becomes.* Here, a causative structure ('have their public services privatised') is embedded inside a double comparative. The result is a compact, powerful claim that would score highly for Grammatical Range in either IELTS or PTE.

Why combine these structures?
In an IELTS Task 2 body paragraph, you need to develop a single idea with supporting detail. Causative structures provide the specifics (who arranged or caused what), while comparative structures provide the logical framework (how one change leads to another). Used together, they allow you to build a layered argument in two or three sentences instead of five or six — demonstrating exactly the kind of grammatical range that distinguishes Band 7 from Band 6.

How to combine them effectively:
Start with a double comparative to frame the macro argument (*The more automation is adopted in manufacturing...*), then embed causative structures to add detail (*...the more companies have their workforce retrained by specialist consultants...*). You can also add a nuanced comparison to conclude (*...a shift that is not so much a threat to employment as a transformation of it*).

When to hold back:
Combining too many structures in one sentence can confuse the reader. As a rule, use no more than two complex structures per sentence. If you find yourself stacking causative on comparative on passive, break the idea into two sentences. Clarity always takes priority over complexity — an examiner who cannot follow your argument will not reward your grammar, no matter how advanced it is.