Writing a clear topic sentence for a paragraph – English 3AC
Build a paragraph around one clear main idea rather than listing unrelated sentences.
1. State the main idea
A topic sentence tells the reader what the paragraph will develop. It includes a topic and a focus: «Our school garden helps pupils learn about plants». It is more useful than a very broad statement such as «Gardens exist».
2. Support the focus
The following sentences explain, illustrate or support the topic sentence. If the focus is learning about plants, details about observing seeds and watering fit; a sentence about a football result does not.
3. Revise the scope
Avoid claims too broad to support in one paragraph. A topic sentence is often near the beginning in a short school paragraph, although real writing can place it elsewhere.
Summary diagram
Worked example
Topic sentence: «Reading with a partner can improve our understanding». Support: «We can explain difficult words to each other and compare our answers». The support stays focused on understanding through shared reading.
6 exercises with answers
Try the exercise before opening the answer.
Exercise 1
Which is more focused: «Sport is good» or «Team games help pupils practise cooperation»?
Show answer
The second sentence gives a specific focus.
Exercise 2
Write a topic sentence about saving water at school.
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Example: Simple daily habits can reduce water waste at school.
Exercise 3
Does a detail about fixing a leaking tap support that idea?
Show answer
Yes; it is directly related to reducing water waste.
Exercise 4
Does a sentence about a favourite singer fit the same paragraph?
Show answer
Not without a relevant connection; it is normally unrelated.
Exercise 5
Must every paragraph begin with a topic sentence in all kinds of writing?
Show answer
No, but beginning with it is a useful school-writing strategy.
Exercise 6
Improve: «Books are things».
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Example: Short stories can help learners build useful vocabulary.