在雅思阅读中，定位关键词又称核心词、keywords. 它们是题目中的单词，并能代表这道题题目的特点。通过它们能快速定位找到该题目在原文出处。所以，找准定位关键词是帮助我们正确，高效解题的关键。那么，究竟什么是关键词呢?在这里，我把关键词keywords定义为以下三种：

　　 特殊词汇：题目中出现的数字、大写、特殊符号、长相怪异的词。(即眼球词汇)

　　‚ 朴素词汇：简单、具体的词

　　ƒ 逻辑词汇：表示重要的语法结构(并列结构、因果关系、转折对比、递进等)。

　　注意：逻辑词汇是雅思阅读及听力的一大考点，贯穿于雅思阅读8大题型的学习。大家要着重掌握学习。

　　好的，首先我们可以通过以下两个例子具体深入了解关键词keywords的定义范围。

　　例1：

　　Others feel there is more of a case for the theory. Harnessing the wind would not have been a problem for accomplished sailors like the Egyptians. And they are known to have used wooden pulleys, which could have been made strong enough to bear the weight of massive blocks of stone. In addition, there is some physical evidence that the ancient Egyptians were interested in flight. A wooden artefact found on the step pyramid at Saqqara looks uncannily like a modern glider. Although it dates from several hundred years after the building of the pyramids, its sophistication suggests that the Egyptians might have been developing ideas of flight for a long time. And other ancient civilisations certainly knew about kites; as early as 1250 BC, the Chinese were using them to deliver messages and dump flaming debris on their foes.

　　毋庸置疑，通过我们Keywords的定义，在以上这段话中： Egyptians, several hundred years , pyramids, 就属于keywords中的特殊词汇，即眼球词汇。 而wind 则属于keywords中简单，易懂且具体的朴素词汇，再如真题当中的“ear, snow, ice”等这些简单易懂，且在原文中不能被替换的词都属于朴素词汇。

　　例2：

　　What else might the engineer think of? well, blind humans sometimes seem to have an uncanny sense of obstacles in their path. It has been given the name 'facial vision', because blind people have reported that it feels a bit like the sense of touch, on the face. One report tells of a totally blind boy who could ride his tricycle at good speed round the block near his home, using facial vision. Experiments showed that, in fact, facial vision is nothing to do with touch or the front of the face, although the sensation may be referred to the front of the face, like the referred pain in a phantom limb. The sensation of facial vision, it turns out, really goes in through the ears. Blind people, without even being aware of the fact, are actually using echoes of their own footsteps and of other sounds, to sense the presence of obstacles. Before this was discovered, engineers had already built instruments to exploit the principle, for example to measure the depth of the sea under a ship. After this technique had been invented, it was only a matter of time before weapons designers adapted it for the detection of submarines. Both sides in the Second World War relied heavily on these devices, under such codenames as Asdic (British) and Sonar (American), as well as Radar (American) or RDF (British), which uses radio echoes rather than sound echoes.

　　The Sonar and Radar pioneers didn't know it then, but all the world now knows that bats, or rather natural selection working on bats, had perfected the system tens of millions of years earlier, and their 'radar' achieves feats of detection and navigation that would strike an engineer dumb with admiration. It is technically incorrect to talk about bat 'radar', since they do not use radio waves. It is sonar. But the underlying mathematical theories of radar and sonar are very similar, and much of our scientific understanding of the details of what bats are doing has come from applying radar theory to them. The American zoologist Donald Griffin, who was largely responsible for the discovery of sonar in bats, coined the term 'echolocation' to cover both sonar and radar, whether used by animals or by human instruments.

　　在例2这两段真题原文中， 'facial vision', Second World War, The Sonar and Radar,Donald Griffin, 及带引号的 'echolocation' t都属于特殊词汇。而像as well as，or,这样的词就属于逻辑词汇中的并列结构连接词。

　　那么在雅思阅读中常考的逻辑连接词都有哪些呢?我们一起来总结下，方便大家下去记忆学习：

　　常考的并列结构连接词还有：and, rather than, not only, but also, similarly, in the same way, as well as, from...to...等;因果关系连接词有：because, reason, as a result, result in/from, due to, thanks to, so, since, for等;转折关系连接词：but, however, while, yet，in fact, on the one hand,...on the other hand...等;让步关系连接词：even if/though, despite, in spite of, although等;总结关系的连接词：in a word, in brief, on the whole, in general等。递进关系的连接词：what more, moreover, furthermore，again, then, and then，also, another等。

　　在平日学习中，几乎所有的老师都在讲“关键词”，但很多同学在实战中仍然出现关键词定位不准确的问题。究其原因，大多是因为我们在掌握了何为关键词后，却忽略了何种词不能作为关键词!那究竟什么样的词不能作为定位关键词呢?我们一起来总结下：

　　1. 文章主题词。如剑7 Test1 Reading Passage1 原文题目 “Let’s go bats”中，bats这个词就是文章主题词，通篇文章都在讲“bats”, 那这样的词是不能作为关键词帮我们定位的，因为它在文中出现频率太高，无法帮我们缩小寻找答案的范围。

　　2. 同一类型题目中频繁出现的词。如：在剑7 Test 2 Reading Passage3 是非判断题中31~35 四个题目中，“MIRTR”(马科特乡村一体化交通项目)这个词虽为大写，属于关键词中的特殊词汇，但由于它在是非判断这一题型三个题目中都出现了，那这个时候这样的词也是不能再作为关键词帮我们定位了。原因如1。

　　3. 常用表达词。如：The, other...

　　4. 题目中抽象的单词：如：description, development, importance...这样词都很抽象，且归纳性很强，所以也是不能做关键词来定位的。