英语大作文的描绘主要可以分为以下几个步骤：

首段描绘图画

简单描述：首先简要描述图画的内容，可以使用“There be”句型来引出图画中的人物或事物，并使用形容词进行修饰，如“simple but inspiring”或“ordinary yet special”。

具体细节：在描述图画时，可以使用介词短语来表状语，例如“In the picture”或“On the wall”，然后详细描述图画中的人物或事物的状态，使用动词-ing形式或介词短语来伴随描述，如“There are four people gathered around a dining table, all engrossed in their phones”。

引出主题：在描述完图画后，可以简短地提出图画所反映的主题或寓意，例如“This cartoon highlights the impact of mobile phones on social interactions”。

第二段阐述寓意

分析原因：如果图画反映的是社会现象，可以分析该现象出现的原因，通常列举两个原因，如“Economic progress”和“Cultural development”。

举例说明：如果图画反映的是抽象品质，可以举用名人事迹来说明该品质的好处，通常列举一个例子即可。

第三段发表见解

个人评论：进一步说明这种社会现象或抽象品质对于社会所起到的作用或影响，可以结合这种作用和影响给出相应的建议措施，如“To mitigate the negative impact, we should raise awareness and encourage media to promote positive content”。

示例段落

首段：

"The drawing depicts a group of friends sitting together at a café, each lost in their smartphones. This scene reflects the increasing trend of mobile phone dependency in our daily lives."

第二段：

"The phenomenon of people being glued to their phones despite being in social settings has multiple causes. Firstly, the convenience of mobile phones provides instant access to information and entertainment. Secondly, social media platforms have created a platform for people to connect with others, often leading to excessive usage."

第三段：

"While mobile phones bring numerous benefits, their excessive use can lead to social isolation. To address this, individuals should be mindful of their phone usage and make an effort to engage in face-to-face interactions. Additionally, media companies should promote balanced content to encourage healthier phone habits."

通过以上步骤和示例，你可以有效地描绘英语大作文中的图画，并清晰地阐述其寓意和个人见解。