另一种常见的说法是 Jack and his friends went up the mountain together. 这种表达比较口语化，强调他们一起上山的过程。
Jack和朋友爬山用英语怎么说？
如果你想表达 Jack 和朋友们一起爬山，可以用 Jack and his friends climbed the mountain. 这个说法更侧重于爬山这个动作本身。
Jack和他的朋友去爬山，用英语可以说 Jack went hiking with his friends. 这里用 went hiking 表示去爬山或徒步旅行，非常地道。