上舞蹈课用英语可以说是“take a dance class”或“attend a dance lesson”。这两个短语都可以用来描述参加舞蹈课程的学习活动。例如，如果你想表达自己正在参加舞蹈课，可以说“I am taking a dance class today.”或者“I will attend a dance lesson this weekend.”。

接下来，让我们深入了解一下与舞蹈课相关的其他常用英语表达：

1. Sign up for a dance class - 报名参加舞蹈课。

例句：I signed up for a ballet class at the local dance studio.

2. Learn a new dance - 学习一种新的舞蹈。

例句：We learned a new salsa routine in our class today.

3. Practice dancing - 练习跳舞。

例句：I practice dancing every day to improve my skills.

4. Take private lessons - 上私人课程。

例句：She takes private lessons to perfect her technique.

5. Join a dance group - 加入舞蹈团队。

例句：After joining a dance group, I have improved significantly.

6. Attend a workshop - 参加工作坊。

例句：I attended a workshop on contemporary dance techniques last month.

7. Improve your dance skills - 提高你的舞蹈技巧。

例句：By attending these classes regularly, you can improve your dance skills.

这些表达可以帮助你在不同的场合下流畅地使用英语谈论关于舞蹈课程的话题。希望这些信息对你有所帮助！