第一段为开头，包括两句。第一句为主题句，必须提出，通过问题点明全文主题;第二句为扩展句，须进一步说明和支持主题句。或是将关系倒过来，由第一句说明情况，第二句提出问题。

　　第二段为正文，共七句。第一句(句3)为主题句，提出本段的主题，它应与第一段的主题相关和一致。第二句至第七句(句4一句7)为扩展句，说明和支持本段的主题。句与句之间要注意运用好过渡使段落逻辑合理，结构得当。

　　第三段为结尾，简化为一句，也是全文的总结句，它将前面内容总结为一结果，表明自己的论点。

　　三段之间的连接要灵活运用“启、承、转、合”的连接过渡手段。例如：

　　Example 1

　　Television

　　Television presents a vivid world in front of us.(1)(主题句) Through TV, we can learn what is happening half way across the world. (2)(扩展句)

　　Television also plays an important educational role in our daily life. (3)(主题句) For one thing, the TV university provides an opportunity for many young men who can not go to formal universities. (4)(扩展句) For another, children can broaden their scope of knowledge by watching such popular programs as "The Animal World", and "The Mickey Mouse and Duck Donald". (5)(扩展句) Besides, women can learn about the latest fashion of dresses and the best recipe for making fruit cakes. (6)(扩展句) Furthermore, we learn many world advanced technologies from TV programs such as computer and telecommunication. (7)(扩展句) And also we can learn singing, dancing and doing physical exercises in some special TV training courses. (8)(扩展句)In short, the effect of TV's educational role is becoming more and more

　　obvious. (9)(扩展句)

　　Having viewed these several aspects, and with many more TV program produced, I believe that our life will become even more significant. (10)(总结句) (全文共165个词)

　　Example 2

　　Changes in People's Diet

　　There have been some changes nowadays in the diet of the Chinese. (1)(主题句)For example, grain, the main food of most people in China, is now playing a less important role, while the consumption of high-nutrition food such as milk, meat has increased. (2) (扩展句)

　　The changes in diet can be accounted for by a number of factors. (3) (主题句)First, people are much wealthier than before. (4) (扩展句) With a higher income, they can afford to buy good foods which, in the past, were rarely seen on the dinner tables of ordinary families. (5) (扩展句) Another factor is that people have realized the importance of a balanced diet to their health. (6) (扩展句) Lack of certain amount of meat or milk, for example, will result in poor health. (7) (扩展句) Finally, owing to the economic reform, meat and milk, which were scarce in the past, are produced in large quantities. (8) (扩展句) For all those reasons, what was formerly called "the basket of vegetables" has become that of varied foods. (9) (扩展句)

　　To sum up, insignificant as those changes may seem, they are the signs of the improved economic condition in China, and we believe that as the effort in the modernization movement continues, there will be greater changes in people's diet in the future. (10) (总结句)