we could hear the sound of the rain and our footsteps mixing with our laughter
问题描述：
we could hear the sound of the rain and our footsteps mixing with our laughter
为什么又把mixing改成mixed
答
这是一个固定的用法啊,加了with就要这样用啊!就像face,本来就可以直接用face sth.,但如果加了with,就必须用be faced with了