Question 1

When should I use "whom" instead of "who"?

Accepted Answer

Use "whom" when the pronoun is the object of a verb or preposition, especially in formal English. "The man whom I met" — "whom" is the object (I met him). "The colleague to whom I spoke" — "whom" follows the preposition "to." In everyday spoken English, "who" is widely accepted in both subject and object positions: "The man who I met" sounds perfectly natural. However, in formal writing, business emails, academic essays, and advanced exams like Cambridge C1 or IELTS Academic, using "whom" correctly demonstrates strong grammatical control and formal register awareness.

Question 2

Is "whom" still used in modern English?

Accepted Answer

Yes, "whom" is still used, though less frequently than in the past. In everyday conversation, most native speakers use "who" for both subject and object positions, and this is widely accepted. However, "whom" remains important in formal written English — academic papers, legal documents, business correspondence, and quality journalism all use it regularly. After prepositions, "whom" is particularly resilient: "to whom," "with whom," and "for whom" sound natural even to speakers who rarely use "whom" elsewhere. In English exams, "whom" appears in formal writing tasks and sentence transformation exercises, so it is worth learning.

Question 3

How do I test whether to use "who" or "whom"?

Accepted Answer

Use the "him/her" test. Rearrange the relative clause into a simple statement and see which pronoun fits. "The woman _____ I invited" — rearrange: "I invited her" (not "I invited she"), so use "whom." "The woman _____ invited me" — rearrange: "She invited me" (not "Her invited me"), so use "who." Another way to remember: "who" does the action (like "he/she"), and "whom" receives the action (like "him/her"). The letter "m" appears in both "whom" and "him," which can help you remember that "whom" is always the object form.

Whom - Formal Object Pronoun Exercises

Quick Rule

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Relative Clauses Error Correction

Who vs Which

Defining vs Non-Defining

-ed vs -ing Adjectives

Conditionals

Present Perfect