whom/who have you chosen to take part in the sports meet?

问题描述:

whom/who have you chosen to take part in the sports meet?
这句have 有什么作用?
这句换成
you chosen whom to take part in the sports meet?意思一样吗?
3Q...

have 在此和 chosen 搭配为完成时,表达 "你已经决定选择谁去参加运动会” 之意.
这句用简单过去时提问也行:who/whom did you choose ...
作为问句,who/whom 必须置于句首.