如果你想表达一架飞机撞上了牌子，你可以用英语表示为"the plane crashed into the sign"。这个短语的来源是因为"crash"在这里指的是突然猛烈地撞击或撞坏了牌子，而"into"表示飞机撞到了牌子上面。例句：

The plane crashed into the sign and burst into flames. (飞机撞上牌子后爆炸起火。)
The pilot tried to avoid the sign, but it was too late and the plane crashed into it. (飞行员试图躲开牌子，但为时已晚，飞机撞上了它。)
Fortunately, no one was injured when the plane crashed into the sign. (幸运的是，飞机撞上牌子时没有人受伤。)