Do you kone the boy waving his hand towards us?为什么用 waving
问题描述：
Do you kone the boy waving his hand towards us?
为什么用 waving
答
正确的解析！
因为前面用know,所以后加ing，
就像hear 后面都会加ing
答
你认识那个正在朝我们招手的男孩么？
因为这里wave his hands是BOY的定语，所以不能直接用wave,而这句话的意思表示的是正在招手，所以得用waving
答
现在分词
boy和wave之间是主动结构,所以用waving现在分词=who is waving
答
相当于do you know the boy who is waving his hand towards us
waving做伴随状语