一起参加活动用英文怎么说

参加活动的英文表达方式有：

Participate in the event/activity
Join the event/activity
Attend the event/activity

来源：这是常用的英语表达方式。

英文例句：

"I will participate in the charity event this weekend."
翻译："我将在这个周末参加慈善活动。"

"I would pke to join the hike next month."
翻译："我想参加下个月的徒步旅行。"

"We will attend the concert tomorrow night."
翻译："我们明晚将参加音乐会。"