如果一个人对跳舞产生兴趣，可以用英文表达为"develop an interest in dancing"。

"Develop" 这个词的意思是"形成、养成"，"interest" 是"兴趣、爱好"的意思，所以 "develop an interest in" 就是"对…产生兴趣"的意思。

下面是一些相关的英文例句，并附上中文翻译：

I developed an interest in dancing when I was a teenager.

我在十几岁的时候对跳舞产生了兴趣。

She developed an interest in jazz dancing after taking a class at the community center.

她在社区中心上课后对爵士舞蹈产生了兴趣。

He developed an interest in ballroom dancing when he was in college.

他在大学时对国标舞产生了兴趣。