A paragraph consists of paragraph parts and using those you can write a perfect paragraph that makes sense and proves some kind of point . first there is a topic sentence its the beginning of a paragraph and it discusses the main idea. Then there is concrete details that support your topic sentence such as facts and quotes directly from the story, it basically supports your point. There is also a commentary sentences that are the extras such as your interpretation . And finally there is a concluding sentence that wraps up your paragraph and it rephrases your topic sentence or the main idea