The Function of a Single Underlined Sentence

A single sentence has no job on its own. "His singularity impelled a closer scrutiny" means nothing about function until you see what sits around it. The question is never what the sentence says, it's what the sentence does to its neighbors: does it promise something the next sentence delivers, does it build on a claim the last sentence made, or does it push back against it. That's why the answer choices use verbs like announces, adds, rejects, explains, instead of just restating content.

On the page, these jobs look different. A set-up sentence makes a claim that the following sentence or sentences then carry out in detail, like a promise paid off. An elaborating sentence takes something already stated and adds a condition, a cause, or a consequence to it, tightening the logic rather than opening a new one. A contrasting sentence does the opposite of what came before: it rejects, complicates, or limits a prior claim, often signaled by words like but, not, or therefore when therefore is doing surprising work. Coming right after another sentence is not enough to make something an elaboration. Order on the page is not a function. You have to check whether the second sentence actually builds on the first's content, or simply changes subject, or turns against it.

This skill sits next to reading whole-paragraph structure, where you map several sentences into a shape like claim, support, complication. A single-sentence function question is that same move, shrunk to one sentence and its two neighbors. When the paragraph is a portrait or narrative, sentences often set up or elaborate, building a picture. When the paragraph argues a point, the same sentence types become moves in a case: conceding, rejecting, or supplying the ground for a conclusion.