柱状图英语作文的写作步骤如下：

引入

使用“As is shown/indicated/illustrated by the figure/percentage in the table（graph/picture/pie/chart）”等短语开篇，明确指示图表的内容和主题。

描述图表

概括图表中的主要数据，例如：“The chart below shows the health spending among five different countries in 2002”。

如果图表是多柱的，选择几个最具代表性的柱子进行描述，例如：“From the table/chart/diagram/figure, we can see clearly that…”。

分析原因

根据图表中的数据变化，分析可能的原因或趋势，例如：“From the sharp/marked decline/rise in the chart, it goes without saying that…”。

个人观点

表达个人的看法或结论，例如：“I believe that the increase in mobile phone subscriptions can be attributed to the growing popularity of smartphones and the increasing affordability of mobile data plans.”。

总结

总结图表中的关键发现，并重申其重要性，例如：“In conclusion, the data presented in the bar chart highlights the significant changes in health spending patterns among the five countries examined.”。

示例

作文题目：The bar chart shows the number of people who visited different museums in London.

作文：

As is shown in the bar chart, the number of people visiting the British Museum has increased significantly over the past decade, while the Victoria and Albert Museum has experienced a slight decline. This shift in visitor numbers can be attributed to the increasing popularity of the British Museum's exhibitions and the growing interest in cultural heritage, as well as the Victoria and Albert Museum's focus on modern art and design. Additionally, the convenience of public transport and the rise of online ticket bookings have likely contributed to these changes.

建议

确保数据准确：在写作前，仔细核对图表中的数据，确保准确无误。

使用恰当的词汇：选择恰当的词汇描述图表中的数据变化，如“significant”、“sharp”、“marked”等。

结构清晰：按照引入、描述、分析、观点和总结的顺序组织文章，使文章结构清晰，易于理解。