你弟弟正在公园里干什么?他正在向那个老人关于昆虫的问题 用英语怎么说

问题描述：

问题解答：

what is your younger brother doing in the park? He is asking to that old man about the questions of insects

What is your brother doing in the park?
He is asking some questions about insect with that old man.

What is you youngerbrother doing in the park?
He is asking that old man questions about insects.
大概是这样吧

What's your younger brother doing in the park now?
He is asking that old man questions about insects.
我不确定question后面用on是不是会更好一点