Tom,you play so well.But l [] you played the piano中间添didnot know还是havenot known 为什么呀

分类: 作业答案 • 2021-12-20 02:19:26

问题描述：

Tom,you play so well.But l [] you played the piano
中间添didnot know还是havenot known 为什么呀

答

did not know 因为说句话之前是“不知道的”,因此用过去时；说这句话的时候其实已经知道了.