mother's face lighted when she saw who it was.这里为什么用lighted

mother's face lighted when she saw who it was.这里为什么用lighted
mother's face lighted when she saw who it was.这里为什么用lighted

mother's face lighted when she saw who it was.这里为什么用lighted
light是动词,变亮,发光的意思.因为句子是过去式,所以要用一般过去式lighted.
看到那是谁之后,母亲的脸色都变亮了（开心）.

light可以作动词，容光焕发