说起雅思写作，甚至于整个雅思考试，最让环球教育的老师们说破嘴皮，同学们绞尽脑汁的便是"同义替换"（paraphrase）这四个字了吧。的确，作为一枚合格的烤鸭，无时不刻都在想着怎样避免词汇单一。特别是写作，各种同义词和近义词，反义词，词性转换，派生词汇，十八般武艺恨不得都用上。然而我今天恰恰要教大家反其道而行之，且慢慢看套路哦。

我们知道，想要写出一个好的段落，coherence（连贯性）是很重要的。在拉丁语里，动词cohere意思是"hold together(使团结)"。放到写作中，意味着一个句子必须有逻辑的，流畅的连接到下一个句子，中间不能有突然的跳跃。一般来说，想要达到coherence，有很多种方法，比如重复关键词，使用过渡信号词等。而重复关键词（Repeat key nouns）是最最简单的一种达成连贯性的方法。简言之，就是经常性的在一段文字内重复key words。

我们来看一段例文：

Gold

Gold, a precious metal, is prized for two important characteristics. First of all, gold has a lustrous beauty that is resistant to corrosion. Therefore, it is suitable for jewelry, coins, and ornamental purposes. Gold never needs to be polished and will remain beautiful forever. For example, a Macedonian coin remains as untarnished today as the day it was made 25 centuries ago. Another important characteristic of gold is its usefulness to industry and science. For many years, it has been used in hundreds of industrial applications, such as photography and dentistry. The most recent use of gold is in astronauts' suits. Astronauts wear gold-plated heat shields for protection when they go outside spaceships in space. In conclusion, gold is treasured not only for its beauty but also for its utility.

在上面这段文字中，关键词gold出现了7次，指代它的it出现2次，its一共3次。大家可以试着改动一下，把文中的gold都改成it，就会出现由于指代不清而导致的连贯性缺失。

咱们再来看一段task 2 的写作段落：

There are several reasons why people might argue that homework is an unnecessary burden on children. Firstly, there is evidence to support the idea that homework does nothing to improve educational outcomes. Countries such as Finland, where school children are not given homework, regularly top international educational league tables and outperform nations where setting homework is the norm. Secondly, many parents would agree that the school day is already long enough, and leaves their children too tired to do further study when they return home. Finally, it is recognised that play time is just as beneficial as study time from the perspective of brain development.

文章论述了为什么homework可能会成为孩子的负担，而homework一词也出现了4次。有的同学可能会想着要用assignment等同义词来进行替换，其实大可不必。通过重复这一关键词，作者达到了强调的作用，同时整段文字读起来也更顺畅。

好啦，由上面两个例子可以看出，适当的重复关键词可以增强文章的连贯性，同学们一定要试一试哦。不要惧怕雅思写作重复key words，重要的是方法哦。