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在雅思写作的图表题中，我们不能仅仅描述所给图中曲线的走向或是事物所占百分比，我们还要对图中的事物进行比较，描述出他们的主要区别。在写作中，我们可以运用哪些词汇来描述事物间的差别呢？这篇文章就会向大家介绍一些常用的词汇和短语。
先来看下面的图表，然后思考两个问题：
1. Which country has the highest level of pollution?
2. Which country has the lowest?
问题是不是很简单？
The country with the higest level of pollution is USA and the country with the lowest is New Zealand.
对数据作对比和比较分析是雅思写作的必备技能，尤其是在Task 1中。而比较级和最高级则是进行描述的常用方法之一。
下面我们就来学习一下常用的形容词比较级和最高级形式：
比较级用于两件事物间的对比，例如：
Leopards are faster than tigers.
而最高级则用于一种事物与多种事物间的对比，例如：
The leopard is the largest of the four big cats.
我们来看一下比较级与最高级的使用原则：
| Example Word | Comparative | Superlative | |
| Words with one syllable | high | higher | highest |
| Words with three syllables or more | productive |
more productive less productive |
the most productive the least productive |
| Words ending in –y | wealthy | wealthier | the wealthiest |
| Short words ending with a consonant/vowel/consonant | hot | hotter | the hottest |
| Irregular | good | better | the best |
其他的Tips:
写作中仅仅有比较级和最高级是不够的，我们还需要学习其他一些有用的词汇和结构。
下面我们就来列举一些在写作中常用的精彩词汇及结构：
Transitions：
词语互换
1. The Middle East produces high levels of oil; however, Japan produces none.
2. The USA produces large amounts of natural gas. In contrast, South Korea produces none.
3. European countries make great use of solar power. On the other hand, most Asian countries us this method of power generation very little.
Subordinating Conjunctions：
从属连词
1. The Middle East produces high levels of oil, whereas / while Japan produces none.
2. Whereas / While the Middle East produces high levels of oil, Japan produces none.
3. Although the Middle East produced 100 tons oil, Japan produced none.
Other Structures：
其他结构
1. Developing countries are more reliant on alternative energy production than developed countries.
2. Solar power accounts for far less of the total energy production than gas or coal does.
3. Hydropower is not as efficient as wind power.
4. Like Japan, South Korea does not produce any natural gas.
5. The Middle East produces twice as much oil as Europe.
6. Western countries consume three times more oil than the Middle East.
7. Russia consumes slightly more oil than Germany.
8. The UAE produced the same amount of oil as Saudi Arabia.
Using Approximate Data：
使用近似数据
进行对比和比较时，还需要用到一些近似数据，例如：
| 7.1 |
“just over 7 million tonnes” “approximately 7 million tonnes” |
| 65.6 |
“nearly 70 million tonnes” “almost 70 million tonnes” |
Compare and Contrast Language Practice
下面我们来做个小练习，看看下表，我们需要比较哪些？
Gap Fill
Natural Gas Consumption and Production, 2001
| Country | Consumption | Production |
| the USA | 588.9 | 500.0 |
| The United Kingdom | 86.1 | 97.3 |
| The Former Soviet Union | 7.1 | 0.4 |
| The UAE | 30.0 | 35.9 |
| Australia | 19.1 | 28.0 |
| Japan | 68.6 | 0 |
| New Zealand | 4.9 | 5.1 |
| South Korea | 18.9 | 0 |
| Chian | 24.3 | 25.0 |
1. New Zealand consumed the______gas at approximately 5 million tonnes.(*in millions of tonnes)
2. The former Soviet Union produced the______amount at 0.4 million tonnes.
3. The USA was the______consumer and producer of gas at 600 million tonnes and 500 respectively.
4. The USA consumed and produced_______natural gas than any other country.
5. South Korea produced 18.9 millions tonnes of gas;_______, it consumed none.
6. China’s consumption and production of oil were_______at 24.3 and 25.0 respectively.
7. The USA, the Former Soviet Union, Japan and South Korea all consumed more gas_______they produced.
8. Australia consumed four_______gas than New Zealand.
9. ______Zealand produced 5.1 million tonnes of gas, South Korea produced none.
10. New Zealand consumed_______5 million tonnes of gas.
最后，辛达希望广大考生们在备考过程中提升自己的语言水平，取得更好的成绩。
有需要代报考位的同学们，可以直接联系我们，辛达竭诚为您服务。(*^__^*) 嘻嘻…