誰

1. Origins, structure, and basic meaning

• Structure: The interrogative pronoun 誰, read だれ, asks or refers to an unknown person's identity.
• Basic usage: It can ask who is at the entrance, while the form 誰の asks whose object something is.

2. Common pitfalls and similar expressions

• Asking identity and ownership
  • It is used to ask the identity of a person at the entrance or the owner of an umbrella. The second example uses its possessive form.