我的梦想是当一个画家用英语怎么说

你的梦想是成为一名画家，用英语可以表达为 "My dream is to be a painter."

这个梦想的来源可能是因为你对绘画有浓厚的兴趣和才能，或者因为你曾经接触过优秀的画家的作品并被其启发。

下面是一些例句：

"I've always had a passion for painting and that's why it's my lifelong dream to become a painter."
"I was inspired by the works of famous painters and that's why I want to pursue a career in painting."

以上例句的中文翻译分别是：

"我一直对绘画充满热情，这就是为什么成为一名画家是我一生的梦想。"
"我受到了著名画家的作品的启发，所以我想从事绘画行业。"