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三、 因果推理法

因果推理法是基于一个事实的陈述，推出它可能会产生的结果，然后一环扣着一环往下推，直至目标内容出现，也就是论点的内容呈现了。

常结合因果关系的状语从句结构展开论证，要注意推理逻辑连接词的应用，如as, since, because, therefore, hence, thus, as a consequence, consequently, ……

论证高中生毕业后先去工作再上大学的这种作为会带来的不利影响之一——这种方式容易使高中生误入歧途，论证过程如下：

Since high school students are mentally immature, they are less likely to resist the temptation in the real world. As a result, they are more prone to some social evils, such as theft, drug abuse, and so on. So, they may easily go astray and even commit crime.

四、 对照对比论证法

拿相同或相反的事物做比较，相同关系叫对照(comparison)，相反关系叫对比(contrast)。此类论证考生需要重点掌握一些对比对照关系的连词：in contrast, by contrast, on the contrary, while, whereas, likewise, similarly, by the same token。

先看个例子，如：论证广告给消费者提供及时信息，帮助他们做决定中论述到：By contrast, without advertising, a consumer is at the risk of purchasing a product that fails to meet all of his or her needs, because of lack of knowledge of better alternatives in the market.这就是从反面着手，阐述如果没有广告，消费者会受到的影响，用反方的劣势达到衬托正方优势的效果。若想使论点具有说服力，可以尝试寻找对应的参照物相比较，在所选参照物明显的不足面前，本来事物的优点会立刻容易被人信服。

再来分析下对照的例子：They cite that in the sports world, records are always created when a sportsman is facing tough competitions. They believe that, by the same token, in a classroom where clever minds meet, students can achieve their best due to peer pressure. 拿体育比赛中的情况作对照，突出分班教学的必要性。

五、 让步论证法

让步这种方法的优点是能较为全面地看待一个问题，而且反驳更能有的放矢。比如举一个大家特别熟悉的例子，一个男生向女生表白时被拒绝，女生会很委婉地表示，先肯定男生有很多优点，但最终会表示自己并不喜欢他，他不是她喜欢的类型。这种方式一方面不会伤害到男孩的自尊，同时也鲜明地表达了自己的想法。

在这种论证中，常见句型如下：although / though / in spite of the fact that…; as is granted / admittedly…; opponents would argue that...

用以下例子加以说明：

1. As is granted, saving money offers people a sense of security in case of emergency. However, people tend to believe that wise investment can get more profits.

2. Opponents would argue that some of the violence shown on TV is the true portrayal of what is happening around us and people have the right to know it. Although this is undoubtedly true, it also means that people who see them a lot may gradually develop a sense of insecurity and mistrust as they are forced to believe they are living in a dangerous world.

很明显，我们在写作的论证过程中，对以上五种方法可以灵活地加以结合使用，不断地积累相关实例，不断地练习这些思维，在论证中做到游刃有余，充分的论证无疑是考生的加分点。希望以上的方法能为各位考生提供一些帮助。

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