Who...

Who is an interrogative pronoun and relative pronoun in the English language. Its primary function is to refer to people.

As an interrogative pronoun, "who" is used to ask questions about the identity of a person or persons. For example: "Who is coming to the party?" In this case, "who" asks for the name or identity of the person attending. It is typically used when the answer is expected to be a person. "Who" functions as the subject of the verb when used interrogatively. The objective form of the interrogative pronoun is "whom".

As a relative pronoun, "who" connects a dependent clause to an independent clause, providing additional information about a person already mentioned. For example: "The woman who won the lottery is my neighbor." Here, "who won the lottery" provides more information about "the woman". Similar to its interrogative use, "who" as a relative pronoun specifically refers to people, not objects or places. The objective form of the relative pronoun "who" is also "whom", and the possessive form is "whose".