新gre写作技巧：深入浅出谈类比

　　一、类比在ISSUE中的应用。

　　ISSUE是立论文，也就是说，我们需要用理由或例子去支持自己的观点。在英语(论坛)中有个单词叫comparable，直译的话是可比较的，其实它等同于similar（相似的）这个单词，因为在西方文化中，只有相似的东西才具有可比较性。因此相似性也就成为了整个类比关系的前提和基础。

　　个人认为，类比（Analogy）在上述提到的五种论据方法中是最有逻辑性的，使用得当可以省力又出彩地证明观点。它有点像中学时代所学的几何题，解题的关键不在论证的过程，而是添加一条辅助线。只要找到合适的辅助线，论证就是水到渠成的事了。当我们想论证一个抽象复杂的命题AB 时，我们可以选择一个具体形象并且不需要证明的D来作为辅助线，然后就把原本复杂的AB的论证过程替代为论述AB和CD之间的相似性就可以了。这里需要指出的是，所谓具体形象且不需要证明的CD其实指的就是事实或常识。所以类比关系建立的难点就在与选择合适的CD。我们来看个例子。考试大，考
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　　The Negro has callus growing on his soul and it’s getting harder and harder to hurt him there. That’s simple law of nature. Like a callus on the foot in a shoe that’s too tight. The foot is nature’s and that shoe was put on by man. The tight shoe will pinch your foot and make you holler and scream. But sooner or later， if you don’t take the shoe off， a callus will form on the foot and begin to wear out the shoe.

　　It’s the same with the Negro in America. That shoe—the white man’s system—has pinched and rubbed and squeezed his soul until it almost destroyed him. But it didn’t. And now a callus has formed on his soul， and unless that system is adjusted to fit him， too， that callus is going to wear out that system.

　　很显然在这段文字中，作者想证明的是全文第二段的最后一句话：And now a callus has formed on his soul， and unless that system is adjusted to fit him， too， that callus is going to wear out that system.（现在黑人的灵魂中已经产生了老茧，除非白人的统治体系能调整以适合他们，否则老茧将使这个体系土崩瓦解。）简而言之，就是黑人终将冲破白人统治。