七、 挑战极限原则
　　既然十挑战极限，必然是比较难的，但是并非不可攀！
　　原理：在学生的文章中，很少发现诸如独立主格的句子，其实也很简单，只要花上5分钟的时间看看就可以领会，它就是分词的一种特殊形式，分词要求主语一致，而独立主格则不然。比如：
　　The weather being fine, a large number of people went to climb the Western Hills.
　　Africa is the second largest continent, its size being about three times that of China.
　　如果您可一些出这样的句子，不得高分才怪！
　　文章主体段落三大杀手锏：
　　一、举实例
　　思维短路，举实例！提出一个观点，举实例！提出一个方案，举实例！而且者也是我们揭示一个观点最好的方式，任何情况下，只要我们无法继续文章，不管三七二十一，尽管举例子！
　　In order to attract more customers, advertisers have adopted every possible stimulative factor in making ads, such as sound, light, colours, cartoon films and human performance.
　　For instance, to advertise a certain food, advertisers will ask an actor or actress to sit at a table and devour the seemingly delicious food while they fime him or her.
　　更多句型：
　　To take … as an example, One example is…, Another example is…, for example
　　二、做比较
　　方法：写完一个要点，比较与之相似的；又写完一个要点，再比较与之相反的；
　　世界上没有同样的指纹，没有相同的树叶，文章亦同，只有通过比较，你才会发现二者的相同点（through comparison）和不同点（through contrast）。下面是一些短语：
　　相似的比较：
　　in comparison, likewise, similarly, in the same manner
　　相反的比较：
　　on the other hand, conversely, whereas, while, instead, nevertheless, in contrast, on the contrary, compared with …, …
　　三、换言之
　　没话说了，可以换一句话再说，让你的文章在多一些字，或者文邹邹地说，是让读者更充分的理解你的观点。
　　实际就是重复重复再重复！下面的句子实际上就三个字 I love you!
　　I am enthusiastic about you. That is to say, I love you.
　　I am wild about you. In other words, I have fallen in love with you.
　　或者上面我们举过的例子：
　　I cannot bear it.
　　可以用短语表达：I cannot put up with it.
　　因此可以这样说：I cannot bear it. That is to say, I cannot put up with it or I am fed up with it.
　　更多短语：
　　in more difficult language, in simpler words, put it more simply