He was looking ahead vigilantly.

英 美
  • 他警惕地注视着前方。
  • ahead adv.领先;预先;在前;向前;提前
  • he pron.他;任何人n.男人;雄性动物
  • looking adj.有...样子的;有...相貌的动词look的现在分词
  • vigilantly adv.警惕地;留心地
  • was v.是(is,am的过去式)