英语句子there are some children having fun in the yard为什么这里要用having?而不是have.而且为什么There are some children who are having fun in the yard.(定语从句)= There are some children having fun in the yard.（伴随状语）?
问题描述：
英语句子there are some children having fun in the yard
为什么这里要用having?而不是have.
而且为什么There are some children who are having fun in the yard.(定语从句)
= There are some children having fun in the yard.（伴随状语）?
答
having是非谓语.一句话里不能有两个谓语,are已经是谓语,所以第二个动作have只能变为动名词having,作伴随状语,表示的是一种状态,children正在Have fun
定从相当于加了一句从句了,所以就可以出现be动词are,are having是从句的谓语