开头句：

　　1：It is well-known to us that……(我们都知道……)==As far as my knowledge is concerned, …( 就我所知…)

　　2：Recently the problem of…… has been brought into focus. ==Nowadays there is a growing concern over ……(最近……问题引起了关注)

　　3：Nowadays(overpopulation)has become a problem we have to face.(现今，人口过剩已成为我们不得不面对的问题)

　　4：Internet has been playing an increasingly important role in our day-to-day life. It has brought a lot of benefits but has created some serious problems as well.(互联网已在我们的生活扮演着越来越重要的角色，它给我们带来了许多好处但也产生了一些严重的问题)

　　5：With the rapid development of science and technology，more and more people believe that……(随着科技的迅速发展，越来越多的人认为……)

　　6：It is a common belief that……==It is commonly believed that……(人们一般认为……)

　　列举原因

　　1：The reason why + 句子 ~~~ is that + 句子 (...的原因是...)

　　2:This phenomenon exists for a number of reasons .First,…….Second,…….Third，……。这一现象存在有很多原因的，第一……第二……第三……

　　3：For one thing,…… For another thing，…… ==On the one hand,……On the other hand……一方面……另一方面……

　　4：I quite agree with the statement that……The reasons are chiefly as follows.我十分赞同这一论述，即……。其主要原因如下。

　　解决问题

　　1：The best way to solve the troubles is……解决这些麻烦的最好办法是……

　　2：As far as something is concerned,……就某事而言，……

　　3;It is obvious that……很显然……

　　4：It may be true that……but it doesn't mean that……可能……是对的，但这并不意味着……

　　5;It is natural to believe that……but we shouldn't ignore that……认为……是自然的，但我们不应忽视……

　　6：There is no evidence to suggest that……没有证据表明……

　　采取措施

　　1：The best way to solve the troubles is……解决这些麻烦的最好办法是……

　　2：As far as something is concerned,……就某事而言，……

　　3;It is obvious that……很显然……

　　4：It may be true that……but it doesn't mean that……可能……是对的，但这并不意味着……

　　5;It is natural to believe that……but we shouldn't ignore that……认为……是自然的，但我们不应忽视……

　　6：There is no evidence to suggest that……没有证据表明……

　　显示变化

　　1：Some changes have taken place in the past five years.过去五年发生了很多变化

　　2：Great changes will certainly be produced in the international communications.在国际交流中理所当然会发生很多大的变化

　　3：It has increased/decreased from…to…他已经从…增加/减少到…

　　4：The output of July in this factory increased by 15%.这个工厂7月份产量以增加了15%

　　表明事实

　　1：We cannot ignore the fact that……我们不能忽略这个事实……

　　2：No one can deny the fact that……没人能否认这个事实……

　　3：This is a phenomenon that many people are interested in.

　　4:be closely related to ~~ (与...息息相关)

　　表示论证

　　1：From my point of view, it is more reasonable to support the first opinion rather than the second.(在我看来，支持第一种观点比第二种更有道理)

　　2：I cannot entirely agree with the idea that……(我无法完全同意这一观点)

　　3：As far as I am concerned/In my opinion,……(就我来说……)

　　4：I sincerely believe that……==I am greatly convinced (that)子句.(我真诚地相信……)

　　5：Finally, to speak frankly, there is also a more practical reason why ……(最后，坦率地说，还有另外一个实际的原因……)

　　推测后果

　　1：Obviously，if we don't control the problem, the chances are that……will lead us in danger.(很明显，如果我们不能控制这一问题，很有可能我们会陷入危险)

　　2：No doubt, unless we take effective measures, it is very likely that ……(毫无疑问，除非我们采取有效措施，否则我们很可能会……)

　　3：It is urgent that immediate measures should be taken to stop the situation(很紧迫的是应立即采取措施阻止这一事态的发展)