雅思写作因果论证要怎么写呢？通过逻辑转化句子的改写干货分享

　　雅思写作的因果论证法要怎么写呢?在雅思写作中通过逻辑转化进行句子的改写，也就是我们说的因果论证，因果论证是雅思写作中最常用、最有效的论证方式之一，所以because也自然成为很多同学写作时最常用的一个词之一。通常稍有语法基础的同学都可以准确使用because引导的状语从句。下面我们通过例子来了解一下。

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　　比如说：Some people think that the average weight of children is increasing because there are more and more fast food restaurants.

　　基础稍微再强一点的同学也可以灵活使用because of/due to的用法。Because of /due to后面是要跟名词或者名词性短语的，所以上面的这句话就可以改成：

　　Some people think that the average weight of children is increasing because of/due to more and more fast food restaurants.

　　More and more这个表达由于在考生中出现频率太高，据环球教育权威情报，已经受到诸多考官的吐槽，所以我们可以用the growing number of来替代，那么这句话就变成：

　　Some people think that the average weight of children is increasing because of the growing number of fast food restaurants.

　　可即便是这样，对于很多同学来讲还是会有because/because of过度使用的困扰。如何避免?今天介绍的办法就是通过逻辑转化来实现句子改写。仔细分析不难发现A + because/because of + B的句子结构的内在逻辑是“因为B，所以A”。这个逻辑把它转化成“B导致了A”在绝大部分情况下都是成立的，于是这句话就可以变成：

　　The growing number of fast food restaurants is causing the average weight of children to increase.

　　中文“导致”最常用的cause 和lead to是有cause/lead sb/sth to do 的结构的，但是这两个词很多情况下都是直接跟名词或名词性短语使用的，所以以上的句子还可以改成：

　　The growing number of fast food restaurants is causing/leading to an increase in the average weight of children.

　　通过简化还可以变成

　　The growing number of fast food restaurants is increasing the average weight of children.

　　在来个例子：

　　Consumers spend more because of advertisements

　　逻辑转化

　　Advertisements make consumers spend more或 Advertisements lead to an increase in consumer expenditure 或Advertisements increase consumer spending

　　在看一个例子：

　　It is difficult for students to pass the exam because of tough grading system.

　　逻辑转化

　　Tough grading makes it hard/challenging for students to pass the exam.

　　另外，如果我们用A + because/because of + B的结构来论证的是B的好处的话，还可以活用B allow/enable sb to do sth(A)使某人能够做某事 的句型。比如：

　　Young people become more independent and self-sufficient because they live far from family and friends.

　　这句话显然是要论证年轻人远离家庭和朋友的好处。通过逻辑转化：

　　Living far from family and friends allows/enables young people to become more independent and self-sufficient.

　　再看：

　　People are now able to travel from one place to another very quickly because of modern forms of transportation.

　　这句话需要论证的是现代交通方式的好处。通过逻辑转化：

　　The modern means of transportation allows/enables people to move from one place to another very quickly.

　　准确理解以上句子改写的内在逻辑还可以帮助同学们戒掉一个被考官广泛吐槽的一个句子：With the development of science and technology, …这个表达法的内在逻辑就是随着A…,然后B，with后面的内容通常是这个句子的原因，例如：

　　With the increasing use of mobile phones and computers, fewer people tend to write letters.

　　根据以上的分析，这个句子可以轻松改写成一下句子：

　　Fewer people tend to write letters because of the increasing use of mobile phones and computers. (虽然是很常见的because of，但至少避免了使用被用烂了的表达方式)

　　再通过逻辑转化就可以改成：

　　The increasing use/popularity of mobile phones and computers leads/causes fewer people to write letters.

　　或稍微高级一点

　　The increasing use/popularity of mobile phones and computers leads to/causes the gradual demise of hand-written letters.

　　来源：宁波环球教育 童驹