英语开放性作文的写作方法如下：

仔细审题

仔细阅读题目要求，理解图画内容及其隐含的意义。确定图画中的主要元素及其特点，这是整篇作文立意的基础。

发挥创新思维和发散思维

从不同的、全新的角度看待和分析图画中的事物或现象。尝试从人生哲理、学习态度、社会意义等方面立论，确定论点，并组织论证过程。

描述图画内容

清晰、具体地描述图画中的物象及其特点，注意细节描写，使读者能够形成直观的理解。

阐述个人看法

在描述的基础上，阐述你对图画的理解和看法。可以采用正反论述、对比论述、联系实际举例论述等方法，使论证过程更加有说服力。

使用过渡词和过渡句

在描述和阐述之间适当使用过渡词或过渡句，使文章结构更加清晰，逻辑关系更加流畅。

保持内容健康充实

文章内容应乐观向上，以积极的态度进行表达。避免使用消极或负面的词汇和句子。

注意语言逻辑和语法

使用恰当的词汇和句型，确保句子和段落之间的逻辑关系清晰。注意语法正确，标点符号准确，单词拼写无误。

检查和完善

完成初稿后，认真检查文章，确保没有语法错误、拼写错误和标点符号错误。可以请他人帮忙校对，提出修改建议。

题目：In the picture, there stands a tree full of fruit on one side of the stream. Across the stream, a man is trying to reach out on the edge of the band for the fruit with a net attached to a pole. Not far away there is a bridge that can lead him to the tree for more fruit. What do you think？

作文：

In the picture, we see a tree laden with fruit on one side of a stream, and a man on the other side trying to reach the fruit with a net on a pole. However, there is a bridge nearby that could easily lead him to the tree. This scenario prompts us to think about the best path to achieve our goals.

On the one hand, the man could continue trying to reach the fruit with his net, which might be challenging and require a lot of effort. On the other hand, he could take the easier and more straightforward route by crossing the bridge to the tree. This choice highlights the importance of choosing the right tools and methods for success.

In our own lives, we often face similar choices. Do we persevere in our efforts, or do we take the easier path？ While persistence can sometimes lead to success, it is often more efficient and less frustrating to use the right tools and resources.

Therefore, it is crucial to assess our situation and choose the best path to achieve our goals. By doing so, we can save time, effort, and resources, and ultimately achieve greater success.

通过以上步骤和示例，你可以更好地掌握英语开放性作文的写作方法，提高写作水平。