Text Structure and Purpose
Every passage on the test is built on purpose — every sentence is doing a job. These questions ask you to name that job, and once you see the structure, the right answer almost picks itself.
| Function | Signal / clue | Example phrasing in answers |
|---|---|---|
| Introduce | Opening line; states a claim or metaphor | establishes the central idea |
| Give example | 'for instance,' concrete case | illustrates the previous point |
| Contrast | 'but,' 'however,' 'yet' | complicates the earlier claim |
| Conclude | Final line; sums up | summarizes the discussion |
A vocabulary of sentence jobs and the clues that flag them.
A huge help: location clues. The first sentence usually introduces or sets context. The last usually concludes or reflects. A sentence in the middle usually develops, exemplifies, or shifts the argument.
Signal phrases reveal each sentence's structural role.
Watch the verbs in the answer choices. Each choice starts with an action verb — introduce, refute, summarize, illustrate, criticize. Your job is often to eliminate verbs that describe things the passage never does. If there's no opposing view, any choice with "refute" or "counter" is dead. If nothing is being summed up, "conclude" is dead. Match the verb to what's actually on the page.
Check your understanding with a question from this topic:
The following is from a 2019 essay by Ocean Vuong. Language, for me, was always a country I entered illegally. As the child of Vietnamese refugees who spoke little English, I learned early that words were not simply tools of communication but instruments of power—capable of granting access to some rooms while barring entry to others.
What is the primary function of the opening sentence of this passage?
Worked examples
The following is from a science article. The platypus has long puzzled biologists. It lays eggs like a reptile, nurses its young like a mammal, and hunts using electric signals like a shark. These contradictory traits make it one of the most unusual animals ever classified.
The primary purpose of the passage is to
The following is from an essay. Most people assume creativity is a gift you're born with. But consider the painter who fails a thousand times before one canvas works, or the writer who fills wastebaskets with discarded drafts. Talent, it turns out, is mostly persistence in disguise.
What is the primary function of the second sentence ("But consider...one canvas works")?
Common pitfalls
A choice can accurately describe the passage's content yet still be the wrong function. The question asks what the part DOES, not just what it says — always match the action verb, not the topic.
Many wrong answers invent a counterargument that isn't there. If the passage only develops one idea, eliminate any choice with words like refute, challenge, push back, criticize.
First sentences almost never 'conclude' or 'summarize,' and last sentences almost never 'introduce.' Use the sentence's position to rule out impossible jobs fast.
Function questions are about how a part fits the WHOLE passage. Read at least the sentence before and after the target before deciding its job.
Key takeaways
Ask what a sentence DOES, not just what it says — read for jobs, not content.
Whole-passage 'purpose' questions need an answer that covers the entire passage, not just one piece.
Match the action verb in each choice against what the passage actually does; eliminate verbs for things that never happen.
Use location: openings introduce/contextualize, middles develop/exemplify, endings conclude/reflect.
Contrast words ('but,' 'however') and example words ('for instance') reveal a sentence's structural role.
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.