Topic Sentences

Every paragraph should include a topic sentence that identifies the main idea of the paragraph. A topic sentence also states the point the writer wishes to make about that subject. Generally, the topic sentence appears at the beginning of the paragraph. It is often the paragraph’s very first sentence. A paragraph’s topic sentence must be general enough to express the paragraph’s overall subject. But it should be specific enough that the reader can understand the paragraph’s main subject and point.


On the GED, you may be asked to choose a better topic sentence for a paragraph. Sometimes, a topic sentence may be entirely missing from a paragraph, and you will be asked to choose one for it. When choosing a topic sentence, remember these guidelines:

  • The topic sentence should identify the main idea and point of the paragraph. To choose an appropriate topic sentence, read the paragraph and think about its main idea and point.
  • The supporting details in the paragraph (the sentences other than the topic sentence) will develop or explain the topic sentence. Read all the supporting details in the paragraph and think about the ideas they discuss.
  • The topic sentence should not be too general or too specific. When considering the options, look for a topic sentence that is general enough to show the paragraph’s main idea instead of just one of its details. The answer should be specific enough that the reader understands the main idea of the paragraph.

Topic Sentence Exercise

Write a topic sentence for the following paragraph.

During the 1990s, I really enjoyed watching Friends on television every Thursday night. I really wanted Rachel’s haircut—I think every girl wanted Rachel’s haircut back then! Rachel’s haircut went really well with the Guess Jeans that were so popular in the 1990s. I remember all the advertisements for Guess and Calvin Klein Jeans that were in each month’s Sassymagazine. I don’t think Sassy magazine exists anymore, but it was one of the most popular magazines for young women in the 1990s.


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