Paragraphs reflect the development of a single idea .
Since the main idea is contained in the topic sentence of a paragraph, where that topic sentence appears determines the paragraph's classification by type. Pattern 2 Paragraphs Pattern 2 paragraphs place the topic sentence last in a stream of sentences. An Example of a Pattern 2 Paragraph . . . . . . . This shift is due primarily to merchants who find it difficult to relate their sales and merchandizing efforts to unrelated activities. In addition to shifts in marketing strategies, the economic recession has had its impact on the leasing of major exhibitions to shopping centers.