PARTS OF A PARAGRAPH
Paragraphs generally include three parts. All paragraphs have a topic sentence and supporting sentences. Most paragraphs also have a concluding sentence.
THE TOPIC SENTENCE
Every good paragraph has a topic sentence. A topic sentence is the most important sentence in a paragraph. The topic sentence briefly indicates what the paragraph is going to discuss. For this reason, the topic sentence is a helpful guide to both the writer and the reader. The writer can see what information to include (and what information to exclude). The reader can see what the paragraph is going to be about and is therefore better prepared to understand it. For example, in the writing model, the topic sentence alerts the reader to look for communication styles that are ineffective.
Here are three important points to remember about a topic sentence: