二、中間段

　　中間段是文章的正文，其作用是從不同的層面對文章主題進行具體和詳實的解釋和論證。

　　其一般特征是：

　　① 篇幅一般比開頭段和結尾段長。

　　② 每段有相應的主題句。

　　③包含定義、解釋、描寫，說明主題思想的擴展句可以采用實例、數據或個人經歷等寫作手段。

　　④不同種類的段落采用不同的擴展手段。

示例一：中間段的常用核心句型

　　1．Although the popular belief is that…, a current （new / recent） study （survey / poll / investigation） indicates （shows / demonstrates） that….

　　2．Common sense tells us that….

　　3．The increase （change / failure / success） in…mainly （largely / partly） results from （arises from / is because of）….

　　4．The increase （change / failure / success） in…is due to （owing to / attributable to） the fact that….

　　5．Many people would claim that….

　　6．One may attribute （ascribe / owe） the increase （decrease / change ） to…, but…is not by itself an adequate explanation.

　　7．One of the reasons given for…is that….

　　8．What is also worth noticing is that….

　　9．There are many （different / several /a number of / a variety of）causes （reasons） for this dramatic （marked / significant） growth （change / decline / increase） in…. First,…. Second,…. Finally,….

　　10．There is no evidence to suggest that….

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

　　12．Another reason why I dispute the above statement is that….

　　13．It gives rise to （lead to / bring /create） a host of problems （consequences）.

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

　　15．It will exert （have / produce） profound （far-reaching / remarkable / considerable / beneficial / favorable / undesirable / disastrous） effect （influence） on….

　　16．A multitude of factors could account for （contribute to / lead to / result in / influence） the change （increase / decrease / success / failure / development） in….

　　17．In 2000, it increased （rose / jumped / shot up） from 5 to 10 percent of the total （to 15 percent / by 15 percent）.

　　18．By comparison with 2002, it decreased （dropped / fell） from 10 to 5 percent （to 15 percent / by 15 percent）.

　　19．It accounts for 15 percent of the total.

　　20．There were 100 traffic accidents in April, an increase of 5 percent in a five-month period.

　　21．By 2002, only （less than / more than / almost / about / over/ as many as） three quarters （40 percent of / one out of five / one in four） college population （graduates / housewives） as against （as compared with） last year （2002） preferred to （liked）….

　  22．With the development （improvement / rise / growth / general recognition / acknowledgement / realization） of…, vast changes awaits this country’s society.

    23．Now people in growing （ever-increasing / significant） numbers are beginning （coming / getting） to believe （realize / recognize / understand / accept / see / be aware） that….

　　24．According to a（n） recent （new / official） study （survey / report / poll）,….

　　25．History （Our society） is filled （abounds） with the examples of….

　　26．The story （case / instance / situation） is not rare （isolated / unique）, it is one of many examples （typical of dozens）.

　　27．A （one） recent （new / general / nationwide） study （survey / poll / investigation） conducted （taken） at a university by （officials / scientists / experts） indicates （reveals / suggests / shows / proves / demonstrates） that….

　　28．According to （As can be seen in / As is shown in） the figures （statistics / findings / data / graph / table） released （provided） by the government （an institute）, it can be learned （seen / predicted） that….

　　29．There is （no） good （every / little / sufficient / considerable / strong） evidence （proof） to

　　30．Personal experience （Examples I heard / read of） leads me to conclude that….

　　31．We must admit the undeniable fact that….

　　32．No one can deny （ignore / doubt / overlook / obscure / brush aside） the fact that….

　　33．Experience （Evidence） suggests （shows） that….

　　34．Take for example…who （that）….

　　35．The same is true of….

    36．As the saying goes,“….”