5.分类法:分类法是指对文章中提到的某个概念进行详细分类，分门别类地逐一进行介绍。如：

Nowadays the news media mainly consists of radio, television and newspapers. Each type has its own advantages and disadvantages.

Newspapers are the oldest form for communicating the news. Today many people still begin their day by reading the morning paper while having breakfast，and end their day by reading the evening paper while having dinner.

The invention of the radio has had a tremendous influence on the world. It is able to bring up-to-minute news to distant places in a matter of seconds. Thus the development of the radio has made the world a smaller place.

Television is the most recently developed device for communication. It allows us to see as well as to hear the news. The fact that it enables people to see visual images has had a considerable effect on our perceptions of world event.

分析:文章对报纸、收音机和电视三类新闻媒介分开进行说明,指出了每种媒体的特点,使读者一 目了然。 下面给大家介绍几种中间段常用的核心句型，以便大家更好地组织文章的中间部分。

1.The change in... mainly results from...

2.The increase in... is due to the fact that...

3.Many people would claim that...

4.One of the reasons given for... is that... What is also worth noticing is that...

5.There are a variety of reasons for this dramatic growth in... First,…Second，... Finally，...

6.There is no evidence to suggest that...

7.Why are(is/do/did) — ? For one thing，…for another,

8.There are numerous reasons why...，and I shall here explore only a few of the most important ones.

9.It will exert remarkable effect on...

10.A multitude of factors could account for(contribute to) the change in...

11.With the development of..., vast changes await this country’s society.

12.History is filled with the examples of...

13.The story is not rare(isolated/unique). It is one of many examples.

14.As is shown in the table released by the government, it can be learned that...

15.There is (no) good evidence to...

16.We must admit the undeniable fact that...

17.No one can deny (brush aside) the fact that...

18.Experience(Evidence) suggests that...

19.The same is true of...

20.As the saying goes,...

 

(三）文章结尾段及常用句型 

我们知道文章的开头很重要，因为好的开头可以吸引读者,抓住读者的注意力。同样,文章的结尾也很重要。好的结尾会便读者对全文的中心思想留下深刻的印象，可以增添文章的效果和说服力，让人深思，回味无穷。 结尾的作用就是概括全文内容，进一步强调或肯定文章的中心思想，使读者加深印象;有时也用于展望未来，提出今后方向或令人深思的问题给读者留下回味和思考的余地。 结尾段有多种组织方式，下面给大家简要介绍几种常用的组织方法： 

1.总结归纳:指简要总结归纳文章要点，以便深化主题印象。如：

In conclusion I would like to say that children need to be understood but children also need to understand their parents. It is only when parents and children come to understand each other that we can solve problems effectively and narrow the generation gap.

分析:文章通过“in conclusion”引出对前面所作论述的归纳，使主题更加明确。 

 

2.重申主题:再次强调和确定文章开头阐述的中心思想。如：

Admittedly, science has created atomic bombs and produced pervasive pollution. But it has transformed the lives of millions of people. It has multiplied man’s energy, hopes, ambitions and understanding. It has elevated and will continue to elevate man intellectually and spiritually.

分析:文章对前文的观点进行了重复，使之更加鲜明。 

 

3.预测展望:立足当前，放眼未来。如：

So to sum up, we should offer our help to all who are in need. We expect to get love from others and we also give love to others. I believe that the relationship between people will be harmonious and our society will be a better place for us to live in.

分析:文章通过对未来积极的展望，说明了爱在生活中的重要性。