RELATIVE PRONOUN

Relative Pronouns

Relative pronouns make up another class of pronouns. They are used to connect relative clauses to independent clauses. Often, they introduce additional information about something mentioned in the sentence. Relative pronouns include that, what, which, who, and whom. Traditionally, who refers to people, and which and that refer to animals or things.

Whether you need commas with who, which, and that depends on whether the clause is restrictive or nonrestrictive.

Who vs. Whom—Subject and Object Pronouns

Now that we’ve talked about relative pronouns, let’s tackle the one that causes the most confusion: Who is a subject pronoun, like I, he, she, we, and they. Whom is an object pronoun, like me, him, her, us and them. When the pronoun is the object of a verb or preposition, the object form is the one you want. Most people don’t have much trouble with the objective case of personal pronouns because they usually come immediately after the verb or preposition that modifies it.

Please mail it to I.

Please mail it to me.

Ms. Higgins caught they passing notes.

Ms. Higgins caught them passing notes.

Is this cake for we?

Is this cake for us?

Whom is trickier, though, because it usually comes before the verb or preposition that modifies it.

Whom did you speak to earlier?

A man, whom I have never seen before, was asking about you.

Whom should I say is calling?

One way to test whether you need who or whom is to try substituting a personal pronoun. Find the place where the personal pronoun would normally go and see whether the subject or object form makes more sense.
Who/whom did you speak to earlier? Did you speak to he/him earlier?
A man, whom I have never seen before, was asking about you