Topic Sentence Generator

Input keywords and AI generates topic sentences within seconds, completely free.

What is Topic Sentence

A topic sentence is a sentence that captures the essence of a paragraph. It presents the main idea or point of the paragraph, helping readers understand the purpose and direction of the paragraph. In academic and formal writing, topic sentences are crucial for ensuring clarity and coherence. They guide the reader through the argument or narrative, providing a clear and concise summary of what is to come in the paragraph.Click me to read more

How to write a topic sentence

Forms of Topic Sentences

Topic sentences usually come in three forms:

  1. Affirmative Sentence: Directly states the main point of the paragraph. For example: "The need for wildlife protection is greater now than ever before."
  2. Rhetorical Sentence: Introduces the main point of the paragraph with a question. For example: "How do you think people will solve the problem of wildlife protection?"
  3. Fragments: Uses a sentence fragment to introduce the main point. For example: "And the workingman?" Beginners should preferably use affirmative sentences for their topic sentences.

Tips for Writing Topic Sentences

  1. Grammatical Correctness: A topic sentence must be a complete, grammatically correct sentence. For example, "Two causes of the American Civil War" is incomplete, while "There were two causes that led to the American Civil War" is grammatically correct.
  2. Use of Limiting Words: Good topic sentences often use keywords or phrases to limit the scope of the discussion. For example, "Air travel is more convenient than train for at least three reasons." In this sentence, the author limits the topic to "air travel" and "train" and will discuss "reasons."
  3. Appropriate Scope: The topic should not be too broad or too narrow. For example, "In Hemingway's story 'Soldier's Home', Krebs tells his mother that he wants no part of God's Kingdom" is too specific, whereas "Let me tell you something about overpopulation" is too broad. A good topic sentence should be specific and manageable, such as "Why has the world population been increasing so rapidly in the last decades?"

Topic sentence example

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Topic sentence Generator for Argumentative Essay

In argumentative essays, the topic sentence serves as the thesis statement, clearly presenting the author's position or argument. It should be debatable and guide the direction of the entire paragraph or essay.

Example: "To effectively combat climate change, the world must immediately implement more aggressive emission reduction strategies, including increasing the share of renewable energy, implementing carbon tax policies, and encouraging green technology innovation."

Topic sentence Generator for Expository Essay

In expository essays, the topic sentence needs to clearly and directly state the main concept, process, or issue that the paragraph will explain, define, or describe. It should summarize the core information of the paragraph, providing a framework for the reader.

Example: "Solar energy, as a renewable energy source, works on the principle of converting light into electricity through the activation of electrons in semiconductor materials by photons, thereby generating current."

Topic sentence Generator for Narrative Essay

In narrative essays, the topic sentence usually sets the scene, introduces the main character, or outlines the core conflict of the story, providing a preview of the unfolding story for the reader. It can be a brief description of a key moment, arousing the reader's curiosity, or directly introducing the theme or lesson of the story.

Example: "That summer, when Emily discovered a dusty old diary in the attic, she had no idea that it would uncover long-hidden family secrets and change her understanding of courage and sacrifice."

Topic sentence Generator for Practical Writing

In practical or functional writing, the topic sentence often follows the greeting at the beginning of a letter, directly stating the main purpose or request of the letter, report, or memo. It should be concise and direct, clearly pointing to the core intent of the document, making it easy for the reader to quickly grasp the key information.

Example: "This report aims to analyze the sales data from the last quarter, identify growth trends and potential market opportunities, and provide data support for the sales strategy adjustment for the next quarter."