代词

1. (表示身份不确定)无论是谁
You use whoever to refer to someone when their identity is not yet known.

2. (指与人的身份无关)无论是谁
You use whoever to indicate that the actual identity of the person who does something will not affect a situation.

3. (用在疑问句中代替who作为强调，通常表示惊讶)究竟是谁
You use whoever in questions as an emphatic way of saying 'who', usually when you are surprised about something.

4. (表示不确定)或是别的什么人（或组织）
You say or whoever to refer vaguely to another person or organization, especially when you are not sure if you have mentioned the right person or organization.