2018年托福写作中主干句如何扩充?考生都知道，在托福写作中，开通是重要的环节，考生要在这里多加用心，这里新航道小编为大家主要讲讲如何在托福写作中如何扩充主干句，希望大家有所了解。

　　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.

　　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

　　短语：

　　in more difficult language, in simpler words, put it more simply

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