The boy is helping an old man cross the street改为一般疑问句
问题描述：
The boy is helping an old man cross the street改为一般疑问句
答
对The boy
Who is helping an old man cross the stree?
对is helping
What is the boy doing?
对an old man
Who is the boy helping cross the stree?
望采纳。。。
答
Is the boy helping the old man cross the street?
答
这道题的正确答案是：
Is the boy helping an old man cross the street?
这个男孩正帮一位老人过马路吗?