它好丑用英文怎么说

"It is ugly" 可以用英语表示为 "It is unattractive"。"Unattractive" 是 "not attractive" 的形容词形式，表示不吸引人的。

例句：

The old building is unattractive. (那座旧建筑很不好看。)
I don't think that dress is very attractive. (我认为那件衣服不怎么好看。)
The color scheme is unattractive. (颜色方案不好看。)