Whom and Formal Pronoun Case

Object relative/interrogative pronoun.

Examples

• To whom did you write?

Key rules

• Who is subject, whom is object
• Use whom after prepositions: to whom, with whom
• In speech who is common
• After than/as formal: taller than I (am)

Common mistakes

• Whom is calling → Who is calling
• To who did you speak → To whom did you speak