the little girl was shy and she___(cover) her face with her hands when she saw some strangers
问题描述：
the little girl was shy and she___(cover) her face with her hands when she saw some strangers
如题,横线上应该填什么形式.
答
covered （前面的was和后面的saw得知,体现一般过去时）.为什么不是was coveringwas covering是过去进行时结构，表示一种一直持续的动作或状态。