Text Structure and Purpose
Structure-and-purpose questions ask *why is this passage written this way?* — they reward students who can name the author's strategy, not just summarize the content.
These questions come in two flavors:
1. Purpose questions: "The main purpose of the passage is to ____." Pick the verb that matches the author's goal: describe, argue, compare, refute, propose, etc.
2. Structure questions: "What is the function of the second paragraph?" or "How does the author build the argument?" Pick the choice that names the role a section plays — example, counterargument, definition, transition, etc.
The key skill is shifting from content to function. What the passage says is content. Why a sentence is there is function. Both questions test function.
| Verb | What the author is doing | Signal words |
|---|---|---|
| Describe | Neutrally explain how something is | *is*, *consists of*, *typically*, no clear stance |
| Argue | Take a position and defend it | *should*, *must*, *the best*, evidence + counter-evidence |
| Compare | Hold two things up against each other | *whereas*, *unlike*, *both*, *similarly* |
| Refute | Attack a prior claim | *however*, *contrary to*, *flawed*, *fails to* |
| Illustrate | Use a specific case for a general pattern | *for example*, *consider the case of* |
| Propose | Suggest a course of action | *could*, *one approach*, *we recommend* |
Common purposes & how to spot them:
- Argue — the passage takes a position and defends it (look for should, must, evidence and counter-evidence)
- Describe — the passage explains how something is, with no clear stance (look for neutral language)
- Compare/contrast — the passage holds two things up against each other (look for whereas, unlike, both)
- Refute — the passage attacks a prior claim (look for however, contrary to, flawed)
- Illustrate — the passage uses a specific case to show a general pattern
The technique for paragraph-function questions:
- Read the paragraph in question.
- Ask "if this paragraph were removed, what would the passage lose?"
- Match that loss to a choice. ("It would lose the example showing X" → look for "provides an example to illustrate X.")
Distinguishing function from summary: summary says what the paragraph contains; function says what role it plays in the larger argument. The right answer is the role, not the recap.
Quick check. Ask of the passage *what is the author doing?* — match a specific verb (describe / argue / compare / refute / illustrate / propose) — then pick the choice with that verb.
The passage below is adapted from James Baldwin's 1963 essay "A Talk to Teachers." The purpose of education, finally, is to create in a person the ability to look at the world for himself, to make his own decisions. Every society, however, appears to believe that its particular way of functioning represents the only sane way of living. This contradiction is the root of the educational crisis.
What is the primary function of the opening sentence of this passage?
Worked examples
A passage on sleep cycles spends three paragraphs explaining REM/non-REM phases, then a fourth paragraph describing what happens when sleep is repeatedly interrupted: cognitive impairment, mood changes, and elevated stress hormones.
What is the main purpose of the passage?
In a passage arguing that high schools should start later, the second paragraph reads:
Critics point out that later start times conflict with parents' work schedules and after-school activities. They argue that families would struggle to coordinate transportation, and that sports teams would lose practice time. These concerns are real but solvable: many districts have already adjusted by staggering bus routes and shortening sport seasons by 10%.
What is the function of this paragraph?
Common pitfalls
Refute and condemn sound impressive — but they only fit if the passage actively attacks something. Most passages just describe or propose. Don't upgrade neutral writing to argumentative.
"The paragraph describes how bees pollinate crops" is summary. "The paragraph provides an example to support the broader claim about ecosystem services" is function. The test wants function — the role, not the recap.
Sometimes a paragraph's job is to transition — bridge from one idea to another. Its content may seem random, but its function is connection. If a paragraph feels like it 'doesn't say much,' check whether it's a transition.
A paragraph might end with a strong claim that sounds like its function — but the function is what the whole paragraph does, not just its last sentence. Read the whole thing.
Key takeaways
Purpose questions ask about the author's strategy — match the right verb (describe / argue / compare / refute / illustrate / propose).
Function questions ask what role a section plays in the larger passage — example, counterargument, definition, transition.
Test by removal: if the paragraph were gone, what would the passage lose? That's its function.
Don't upgrade neutral language to combative — most passages describe; few refute.
Function ≠ summary. The right answer names the role, not the content.
Watch & learn
Curated Khan Academy walkthroughs on Text Structure and Purpose. They're complementary to this lesson — watch one if a written explanation isn't clicking, or after to reinforce.
Try it yourself
5 practice questions on Text Structure and Purpose, drawn from the question bank. The tutor is one click away if you get stuck.