合理的段落展開方法能把中心思想和材料有機(jī)地組織起來，讓讀者在閱讀過程中感到很強(qiáng)的條理性。下面主要介紹四種英文段落的擴(kuò)展方法：
因果法
因果法可以有效地說明兩個事物或兩種現(xiàn)象之間的關(guān)系。段落的主題句一般都明確地指出段落所要闡述的是造成某一現(xiàn)象的原因，還是某一現(xiàn)象將引起的后果。以Changes of Ownership of Houses in China(2003.6 & CET-6)一文的第2-3段為例：
Two main reasons may account for this situation. One of the reasons is the policy of the government. In the 1990s, the government carried on with its reform policy to support private houses programs. But it took time for the reform to come into effect. Therefore, in this period the change is little. Another reason is that from 1995 on the reformation took quicker steps, and people were getting better off and they could afford buying their own houses. So the number of private houses is on the rise.
However, such changes have had GREat impacts on individuals and the society as well. To the former, the change has enabled them to have more choices to enjoy larger living space, but the cost is working hard to make more money to buy it. To the latter, the more choice of housing may mean a big gap between the rich and the poor, and also some other social problems like speculating will occur. Therefore, it is hard to weigh the merits and demerits of these changes.
因果法
因果法可以有效地說明兩個事物或兩種現(xiàn)象之間的關(guān)系。段落的主題句一般都明確地指出段落所要闡述的是造成某一現(xiàn)象的原因，還是某一現(xiàn)象將引起的后果。以Changes of Ownership of Houses in China(2003.6 & CET-6)一文的第2-3段為例：
Two main reasons may account for this situation. One of the reasons is the policy of the government. In the 1990s, the government carried on with its reform policy to support private houses programs. But it took time for the reform to come into effect. Therefore, in this period the change is little. Another reason is that from 1995 on the reformation took quicker steps, and people were getting better off and they could afford buying their own houses. So the number of private houses is on the rise.
However, such changes have had GREat impacts on individuals and the society as well. To the former, the change has enabled them to have more choices to enjoy larger living space, but the cost is working hard to make more money to buy it. To the latter, the more choice of housing may mean a big gap between the rich and the poor, and also some other social problems like speculating will occur. Therefore, it is hard to weigh the merits and demerits of these changes.