走在前面用英语怎么说？

走在前面

例句

• A few carefully chosen men went ahead while main body remained concealed in the valley. 精心挑选出来的几个人走在前面,大队人马则隐藏在山谷里。
• The porter walked ahead, Corbett and Ranulf strolled behind. 搬运工走在前面, 科比特和拉努尔夫踱着步,跟在后面.
• Tom was leading, a rifle slung over his back. 汤姆走在前面，背上挂着一支步枪。
• Mark was out of earshot, walking ahead of them. 马克走在前面，听不见他们的声音。