Why are you so happy today? Because I have been chosen to be the _英语解答

Why are you so happy today? Because I have been chosen to be the chairperson.
此段对话的回答部分中的have been chosen为什么不能换成was chosen?

人气：352 ℃　时间：2019-10-10 01:07:33

解答

因为强调I have been chosen to be the chairperson对现在的影响是使我高兴
而不是只为说I have been chosen to be the chairperson这个动作的发生