11. Topic Sentences and Signposting Topic sentences and signposts make an essay's claims clear to a reader. Good essays contain both. Topic sentences reveal the main point of a paragraph. They show the relationship of each paragraph to the essay's thesis, telegraph the point of a paragraph, and tell your reader what to expect in the paragraph that follows. Topic sentences also establish their relevance right away, making clear why the points they're making are important to the essay's main ideas. They argue rather than report. Signposts, as their name suggests, prepare the reader for a change in the argument's direction. They show how far the essay's argument has progressed vis-?-vis the claims of the thesis.? Topic sentences and signposts occupy a middle ground in the writing process. They are neither the first thing a writer needs to address (thesis and the broad strokes of an essay's structure are); nor are they the last (that's when you attend to sentence-level editing and polishing). Topic sentences and signposts deliver an essay's structure and meaning to a reader, so they are useful diagnostic tools to the writer—they let you know if your thesis is arguable—and essential guides to the reader.Forms of Topic Sentences Sometimes topic sentences are actually two or even three sentences long. If the first makes a claim, the second might reflect on that claim, explaining it further. Think of these sentences as asking and answering two critical questions: How does the phenomenon you're discussing operate? Why does it operate as it does? There's no set formula for writing a topic sentence. Rather, you should work to vary the form your topic sentences take. Repeated too often, any method grows wearisome. Here are a few approaches.Complex sentences.? Topic sentences at the beginning of a paragraph frequently combine with a transition from the previous paragraph. This might be done by writing a sentence that contains both subordinate and independent clauses, as in the example below. ?Although Young Woman with a Water Pitcher depicts an unknown, middle-class woman at an ordinary task, the image is more than "realistic"; the painter [Vermeer] has imposed his own order upon it to strengthen it.? This sentence employs a useful principle of transitions: always move from old to new information.? The subordinate clause (from "although" to "task") recaps information from previous paragraphs; the independent clauses (starting with "the image" and "the painter") introduce the new information—a claim about how the image works ("more than ?realistic'") and why it works as it does (Vermeer "strengthens" the image by "imposing order").? Questions.? Questions, sometimes in pairs, also make good topic sentences (and signposts).? Consider the following: "Does the promise of stability justify this unchanging hierarchy?" We may fairly assume that the paragraph or section that follows will answer the question. Questions are by definition a form of inquiry, and thus demand an answer. Good essays strive for this forward momentum.Bridge sente
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