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Text Structure & Purpose questions trip people up because they answer the wrong question. They tell you what the sentence says. But the test is asking what the sentence does: its job in the paragraph. Learn to read for function and these get easy.
Key takeaways
- These ask about function (what a part does), not content (what it says).
- Common jobs: introduce, support, counter, illustrate, conclude, qualify.
- Name the job in a verb before you read the choices.
- The trap is a choice that accurately summarizes the line but names the wrong job.
Read for the job, not the words
Every sentence in a well-built paragraph has a job: it sets up an idea, gives evidence, raises an objection, gives an example, or wraps up. When a question asks for the "function" or "purpose," answer with a verb: this sentence introduces a counterargument. Then find the choice that matches that verb. (The same function-first reading pays off on cross-text connections, where you pin what each author is doing.)
A choice can correctly restate what the sentence says yet name the wrong job. "It describes a study" might be true, but if the sentence’s purpose is to undercut the previous claim, that’s the answer.
The function-verb vocabulary
The choices on these questions are built from a small set of verbs, and half the battle is knowing exactly what each one claims a sentence is doing. These are the ones that decide answers.
| Verb | What it claims the sentence does |
|---|---|
| Illustrate | Give a concrete example of a claim already made. For instance energy, even when the phrase is missing. |
| Concede | Admit the other side has a point, usually right before pushing back. The it’s true that… move. |
| Qualify | Shrink a claim’s scope: usually, in most cases, under these conditions. The claim survives, just smaller. |
| Undermine | Weaken a claim, typically with contrary evidence. Stronger than qualify: the claim is in real trouble. |
| Anticipate an objection | Raise the doubt a skeptical reader would have, so the author can answer it on their own terms. |
| Characterize | Describe what something is like, without arguing for or against anything. |
Try one
Many assume that working from home tanks productivity. A 2021 study of 16,000 employees, however, found output rose 13% after the switch, driven mostly by quieter, more focused mornings.
What is the main purpose of the underlined sentence (the study sentence)?
One more: the concession
The hardest version of these asks about a sentence that seems to hurt the author’s own argument. It doesn’t. It’s doing a job, and the verb for that job is concede.
Citizen-science projects, which recruit volunteers to collect data, are sometimes dismissed as unreliable. Early bird-count programs, admittedly, were riddled with misidentifications. But modern projects pair every volunteer sighting with photo verification and statistical cross-checks, and their datasets now anchor peer-reviewed studies.
What is the main purpose of the second sentence?
The method
- 1
Locate the part in its paragraph
Read the sentence before and after. Function is about relationships.
- 2
Name the job as a verb
Introduces / supports / counters / illustrates / qualifies / concludes.
- 3
Match the verb
Pick the choice whose verb matches yours; reject ones that only restate content.
Drill function-not-content reading with a tutor that asks 'what’s its job?'
Practice Text Structure & Purpose →Frequently asked questions
- What do Text Structure and Purpose questions test?
- They test whether you can identify the function of a part of a text, what a sentence or passage is doing (introducing, supporting, countering, illustrating, concluding), rather than just what it says.
- How do I answer purpose questions on the SAT?
- Name the job of the part as a verb (introduces, counters, illustrates, etc.) before reading the choices, then match it. Reject options that merely restate the content but name the wrong function.
- What’s the most common mistake on these questions?
- Choosing an answer that accurately summarizes what the sentence says but misidentifies its job in the paragraph. Always read for function, not content.
- What does it mean to 'qualify' a claim?
- To narrow its scope without abandoning it: adding conditions like 'usually' or 'in most cases.' It’s weaker than undermining (which attacks the claim) and different from conceding (which admits the other side’s point).