雅思大作文总是不切题该怎么办？雅思大作文需要提供充分的案例和论证，对于考官而言，topic-related lexis是高分大作文最有吸引力的要点之一。

但是很多烤鸭都存在下面这几种情况：

1. 下笔时完全想不出具体的案例和细节，一脸懵逼;

2. 平时侃侃而谈，但是发现自己侃大山的内容似乎只适合茶话会，不太适合正规写作;

3. 自己的中文脑回路的内容完全无法用英文表达出来，无论是词汇的表达，还是语义的连贯流畅，都没有打动考官的地方。

因此，我们需要有充分的观点来源和支撑点。今天，小编将带你寻找真正能够打动考官的案例和细节，让你的大作文真正活起来。

首先我们来看几道雅思真题：

Question 1：

Renewable energy, such as solar and wind power, have shown great promise. However, they are often disappointed in practice. What are the advantages and disadvantages of these forms of power generation compared to fossil fuels?

Give reasons for your answer and include any relevant examples from your own knowledge or experience.

Question 2：

The government should make more efforts to promote alternative sources of energy.

To what extent do you agree or disagree with this opinion?

Give reasons for your answers and include any relevant examples from your own knowledge or experience.

Question 3：

Solar energy is becoming more and more popular as a source of household energy in many countries around the world. What are the advantages and disadvantages of solar energy?

Give reasons for your answer and include any relevant examples from your own knowledge or experience.

这三个题目都是讲述的可再生能源，潜台词就是希望考生将其与传统的非可再生能源相比较，孰优孰劣，希望考生能够给出自己的评价。第三个题目在前两个题目的基础上更加具体了，主要问太阳能的优劣，其实换成风能、水能应对方法是一样的，只需要考生提前将新能源的相关利弊思考清楚，考试的的时候将得心应手。

那我们平时究竟是如何思考的呢?很多考生的应对就是绞尽脑汁一小时。

思路很清晰，也能够有非常多的思考点，如果能够用足够连贯的语言组织起来，未尝不是一篇7分典范作文。但是上面的脑图也存在弊端：

1. 野心太大，试图覆盖的点太全太密，导致一个观点可能论证不够充分;

2. 存在一些疑似通用模板的陈述，在作文中需要更加详实具体。比如very cheap to produce in some areas不够具体，比较抽象。

我们在生活中可以有意识的在比较好的素材中汲取养分，进行改写、吸收，最终将成熟的观点为我所用，在最后的雅思大作文中就有更多的回旋余地。

比如2018年06月09日的新科学家杂志的封面文章就重点讨论了新能源的优势、风险和不确定性：100% RENEWABLES How to keep the lights on without blowing the planet。

有意思的是，文章的副标题Can we really get all our electricity from wind, sun and water by 2050, asks Peter Fairley 正巧就是换了一种说法在问Q1问的问题。而文章也针对这个问题进行了解答。

如果大家仔细看文章，就会发现蓝色部分讨论的是新能源的优势，绿色讨论的是劣势，而橘色给出的是非常具体的大型案例(这个不指望同学们能够用在自己的作文里)。

下面来对比一下某位烤鸭写的作文和本篇外刊文章在措辞上的差距以及我们可以努力的方向。

以下是他写的作文(注意，同学的作文存在很多错误，我们这里原封不动地放上来，是为了能够还原考试情形)。篇幅所限，我们这里只列出一段。

On the other hand, renewable power is not entirely free from drawbacks. The biggest issue is over dependency on nature. As formation of this type of energy is heavily reliant on availability of sun and wind, it could hinder possible production target. As a result, it is not always trustworthy in compare to conventional power generation. Another shortcoming is it cannot produce large amount of energy to meet the current demand. Therefore, even if a government wants to produce such energy at a large scale, it has its own limitations. To illustrate, solar panel is not able to work when the sun is down whereas, fuel can produce energy 24×7.

这位同学的文章很流畅，主要提出两个要点：

1. 新能源对于自然的依赖;

2. 新能源的产量无法满足巨量的需求。

我们再来看一下New Scientist的这篇文章：

对于自然的依赖：

What that spat and the whole 100-per-cent renewables argument really revolves around is one inescapable fact: the most abundant sources of renewable energy, namely wind and the sun, arecapricious. The sun goes down, the wind drops, and seasons vary every year. The supply of renewable energy can plummet inconveniently just when local demand is peaking.

产量无法满足需求(文章里面说的是大规模改造电网带来的经济挑战，但大致含义相符)：

Tackling climate change requires more than just revamping the power grid. Converting services that currently run on fossil fuels, from transportation and heating to heavy industry, is also crucial. Such a transition brings economic challenges. Renewables cost many times more to install than fossil generators, and workers will be dislocated as fossil industry jobs disappear. Low operating costs and reduced wholesale prices will also undercut the business case for flexible power sources, which means the way electricity is traded on the wholesale market will have to change.

可以发现，这其中的很多语料都可以贴合我们的考试题目，并且可以通过日常的积累为我们所用。