[口语]“带头干某事”用英语怎么说？

“带头干某事”在英文中表达为“start/set/get the ball rolling”。

英文意思为

to do something that starts an activity, or to start doing something in order tp encourage other people to do the same

I decided to set the ball rolling and got up to dance.

我决定带个头，就站了起来跳舞。

To get the ball rolling during the lesson, the teacher asked the students to share their ideas.

为了开始课程的内容，老师请学生分享他们的想法。