Topic Sentence Generator
Enter the main idea of one body paragraph and the point that supports it, then choose whether the paragraph argues, informs, or compares. You get six topic sentences with your words slotted in, each with a copy button. Honest templates, no AI. Free, no sign-up.
What is the paragraph doing?
How to Use the Topic Sentence Generator
- 1. Enter the main idea. Name what this one paragraph is about as a short phrase, such as banning phones in classrooms. It appears in every sentence, so write it as a noun phrase.
- 2. Enter the supporting point. For Argue and Inform, write a full clause (students concentrate better without notifications). For Compare, write the basis of comparison as a noun phrase (the amount of contact between students and teachers).
- 3. Choose what the paragraph does. Argue defends a position, Inform explains, and Compare weighs two things. The stance changes the frames, not just the label.
- 4. Pick one frame and rewrite it. Read each aloud, choose the one closest to your meaning, and smooth the grammar. Both fields must be filled before the button works.
What the Six Frames Look Like
For the main idea banning phones in classrooms and the supporting point students concentrate better without notifications, the Argue stance returns these frames.
Argue stance
- Banning phones in classrooms should be taken seriously because students concentrate better without notifications.
- Although some disagree, banning phones in classrooms is justified by the fact that students concentrate better without notifications.
- The strongest reason to support banning phones in classrooms is that students concentrate better without notifications.
- Because students concentrate better without notifications, banning phones in classrooms deserves our support.
- The evidence that students concentrate better without notifications shows why banning phones in classrooms is the right position.
- Banning phones in classrooms matters precisely because students concentrate better without notifications.
With the Inform stance, the main idea the water cycle and the point water moves continuously between the oceans, the air, and the land produce frames such as “A closer look at the water cycle reveals that water moves continuously between the oceans, the air, and the land.” With Compare, online and in-person classes and the amount of contact between students and teachers produce “Online and in-person classes can best be compared through the amount of contact between students and teachers.”
Some frames will not suit your input. A main idea containing “and” is plural, but the Compare frame “In terms of …, online and in-person classes shows more contrast” uses a singular verb. The tool does not fix agreement, so change shows to show yourself.
What Makes a Strong Topic Sentence
- It states one main idea. If your sentence joins two unrelated claims with “and”, you probably have two paragraphs.
- It makes a claim or sets a scope. In an argument it is a sub-claim your evidence must defend. In an explanation it defines exactly what slice of the topic the paragraph covers.
- It connects to the thesis. A reader should see how the point advances the essay's central claim. If the link is not obvious, add a transition.
- It previews and does not prove. Save statistics and quotations for the sentences after it. The topic sentence makes the claim and the rest of the paragraph earns it.
- It is usually first. Placing it at the start of the paragraph makes the essay easy to follow, though some writers place it second after a transition.
Which Tool Do You Need?
| You are writing… | Use |
|---|---|
| The first sentence of a body paragraph | This page |
| A whole paragraph from point, evidence, explanation, and link | PEEL Paragraph Planner |
| A science paragraph: claim, evidence, reasoning | CER Paragraph Generator |
| A paragraph built around a quotation | Quote Sandwich Generator |
| The essay-wide claim these sentences support | Thesis Statement Generator |
Frequently Asked Questions
- What is a topic sentence?
- A topic sentence is usually the first sentence of a body paragraph. It states the paragraph's one main idea and signals how that idea supports your thesis. Everything else in the paragraph, such as evidence, examples, and analysis, should relate back to it.
- How does this generator work?
- You enter a main idea and a supporting point, pick a stance, and the tool places them into six fixed sentence frames. It is not AI: the frames show you common structures, and you adapt the wording so each sentence reads naturally.
- What is the difference between a topic sentence and a thesis statement?
- The thesis statement makes the central claim of the whole essay and appears in the introduction. A topic sentence makes the claim of one paragraph and opens that paragraph. Each topic sentence should support the thesis like a sub-claim.
- Which stance should I choose?
- Use Argue for persuasive and argumentative paragraphs that defend a position, Inform for expository paragraphs that explain a concept, and Compare for paragraphs that weigh similarities and differences.
- Can I use the generated sentence word for word?
- Treat it as a draft. Because the frames are templates, the raw output can sound stiff or have a grammar mismatch depending on how you phrased the inputs. Read the sentence aloud, fix the wording, and check that it previews what the paragraph actually says.
- Should a topic sentence come first in the paragraph?
- Usually, yes. Putting it first tells the reader what to expect. You may put a short transition before it, or save the claim for the end of a paragraph that builds to a conclusion, but opening with it is the clearest choice for most academic essays.
- How many topic sentences does an essay need?
- One per body paragraph. A five-paragraph essay has three, and a longer paper has as many as it has paragraphs. Read them in order with the thesis: together they should outline your argument.