在我们的练习问题中，首先要注意的就是图表是线性图表还是循环类图表。
一个线性过程在不同的地方开始和结束，通常涉及到某物的创造，从原材料到成品。
比如下面这张图表中有关“砖”的制造。这就是典型的线性流程图。
另外一种就是循环过程，从头到尾重复一遍又一遍，比如水循环。
搞清楚流程图类型之后，掌握以下几个写作要领写起来就会轻松很多啦。
流程图写作要领
1. 首先找到流程图的起点，终点，再仔细看过程。对于线性流程图来说，起点和终点通常会是非常明显的，但对于循环类流程图来说，很难第一眼就确定，需要仔细检查图形所要表达的逻辑才能确定。
2. 其次找到图上已标出的那些英文单词。如果出现生词，尽量猜测。无词，就用自己的语言，进行改写，一般是讲名词改成动词，或反之。
3. 按照步骤，分段描述。千万不能省略任何一步。
4. 句子之间一定记得流畅合理的表示顺序的关联词。要不然就成了一对字的流水账了。
5. 句型可以搭配被动，西方写作中比较中意用被动，以及主语从句(例如：It can be seen from the graph that…)。
6. 时态要使用一般现在时。
雅思流程图的重点词汇解析
表述时间：
in 10 days
during the period of 10 days
The process lasts for up to 10 days
after 10 days
10 days passed until something happened.
表示然后：
then, next, in the next state, following that, after that, the next step in the stage is ....
表示过程：
process, procedure, formation, development
表示步骤：
step, stage, phase
时间阶段：
after a period of …months/days/minutes, during…
顺序连词：
first, first of all, in the first stage, initially, to begin with,second, then, next, also
after that, at the same time, in the meantime, meanwhile,prior to, until
the first stage involves …
in the second stage，
in the third stage，
in the last stage，
The next step in the stage is that…
目的连词：
in order to / in order that; so as to / so that
雅思流程图写作案例
最后给大家附上“水循环”高分范文~希望大家能够通过本篇文章学以致用!
The picture illustrates the way in which water passes from ocean to air to land during the natural process known as the water cycle.
Three main stages are shown on the diagram. Ocean water evaporates, falls as rain, and eventually runs back into the oceans again.
Beginning at the evaporation stage, we can see that 80% of water vapour in the air comes from the oceans. Heat from the sun causes water to evaporate, and water vapour condenses to form clouds. At the second stage, labelled ‘precipitation’ on the diagram, water falls as rain or snow.
At the third stage in the cycle, rainwater may take various paths. Some of it may fall into lakes or return to the oceans via ‘surface runoff’. Otherwise, rainwater may filter through the ground, reaching the impervious layer of the earth. Salt water intrusion is shown to take place just before groundwater passes into the oceans to complete the cycle.(156 words, band 9)
Tips：
1.有时候其他的图会更加复杂，这就需要考生先一步一步地去弄清楚发生了什么。
2.选择的关键特征将写作的出发点，挑出2或3个主要特征来写。Task 1只允许使用20分钟，并且要求只使用150个单词，无法包含很多细节。