we saw the ground covered with snow that morning.为什么用covered
问题描述：
we saw the ground covered with snow that morning.为什么用covered
答
cover有覆盖的意思，covered with snow 被雪覆盖了
答
覆盖，被积雪覆盖的意思
答
被雪覆盖嘛,就用过去分词咯,snow covers ground,ground is covered by/with snow
答
那天早上，我们看到了白雪覆盖了地面。