How to Write an English Paragraph
Writing Toolkit · Paragraphs
One idea, fully developed, in a shape readers trust: topic sentence, support, conclusion. This page is the whole craft of the paragraph on one screen.
The Three Parts
A paragraph has the same anatomy everywhere: (1) the TOPIC SENTENCE states the topic plus a controlling idea — the specific claim the paragraph will prove; (2) the SUPPORTING SENTENCES develop it with reasons, examples, and details; (3) the CONCLUDING SENTENCE lands the idea, ideally by reframing rather than repeating it.
- Topic + controlling idea: “Cycling to work (topic) saves money and clears the head (controlling idea).”
- Reasons answer “why?” — Examples answer “for instance?” — Details answer “how much, how many, when?”
- A paragraph with no example is a promise; a paragraph with no reason is a poster.
How Long, and When to Break
Most paragraphs in general writing run 100–200 words — long enough to develop one idea, short enough to hold in the mind. Start a new paragraph when the idea changes, when a new speaker talks (in dialogue), when time or place jumps, or when a paragraph grows so long the reader needs air.
- One paragraph = one idea. Two ideas = two paragraphs, always.
- Online, shorter paragraphs (80–150 words) read better on phones.
- Dialogue: a new paragraph for every change of speaker, no exceptions.
The Development Ladder
Weak paragraphs repeat their topic sentence in new words. Strong ones climb a ladder: claim → reason → example → detail → consequence. Each rung adds information the previous rung did not have. Test every sentence: “What does the reader know now that they didn't before?” If the answer is nothing, the sentence is decoration.
- Claim: “The course changed my career.”
- Reason: “…because it taught me to write reports.”
- Example: “My first report, three months in, was sent to the director unchanged.”
- Consequence: “Within a year I was training new staff.”
Watch Out: Common Errors
✗ Topic sentence: “There are many types of transportation in a city.” (then a paragraph arguing buses are best)
✓ Topic sentence: “Buses are the most democratic transportation a city can buy.” — promise exactly what you deliver.
✗ Five sentences that all say the paragraph's idea in different words.
✓ Climb the ladder: reason, example, detail, consequence. Every sentence must add information.
✗ “In conclusion, as I have stated above, cycling saves money, as mentioned earlier in this paragraph.”
✓ “The bike pays for itself by March — and pays its rider every morning after.”
Practice
Related lessons
✍️ Your First Paragraph: One Idea, Well Built✍️ Paragraph Structure: Topic Sentence, Support, Conclusion✍️ Conclusions That Land: Ending With Force📘 Grammar deep-dive← All Toolkit pages · Writing Lab
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