Interrogative Pronouns

Interrogative pronouns are words we use to ask questions about people, things, and choices. At this level, you will master the difference between who and whom -- a distinction that helps you write more precise and grammatically correct questions.

What You'll Learn

• How to distinguish between who (subject) and whom (object) in questions
• How to use the substitution test to decide between who and whom
• How to apply who vs whom in formal and informal contexts
• How to avoid common who/whom errors in examinations

When to Use

1. Asking about a person who does something (subject): "Who organised the school carnival this year?"
2. Asking about a person who receives an action (object): "Whom did the principal invite to give the speech?"
3. After a preposition in formal questions: "To whom did you address the letter?"
4. Asking about a person being described: "Who is responsible for collecting the homework?"
5. Asking about a person affected by an action: "Whom should we thank for the decorations?"

How to Form

The Substitution Test

The key to choosing between who and whom is to answer the question with a pronoun. If the answer is a subject pronoun (he, she, they), use who. If the answer is an object pronoun (him, her, them), use whom.

Who vs Whom at a Glance

Key Rules

1. Who is for subjects: Use who when the pronoun performs the action. "Who left this bag on the MRT?" (He left this bag.)

2. Whom is for objects: Use whom when the pronoun receives the action. "Whom did you meet at the hawker centre?" (I met him.)

3. Whom after prepositions: When a preposition comes before the question word, always use whom. "For whom is this parcel?" "With whom did you go to the library?"

4. The him/whom test: If the answer uses him, her, or them, the question needs whom. Both "him" and "whom" end in the letter m -- use this to remember.

5. Rearrange to check: Turn the question into a statement and see which pronoun fits. "Whom did the coach select?" becomes "The coach selected him." Since "him" works, whom is correct.

6. Formal vs informal awareness: In everyday speech, many people use "who" in all positions. In examinations and formal writing, you must use "whom" when the grammar requires an object pronoun.

Common Mistakes

Clue Words

Signals for "who" (subject)

Look for question patterns where the answer performs the action: who + verb (who called, who wants, who is, who wrote, who broke)

Signals for "whom" (object)

Look for question patterns where the answer receives the action: whom + did/does/do + subject (whom did you see, whom does she like) preposition + whom (to whom, for whom, with whom, by whom, from whom)

Tip: Remember the m trick -- "whoM" goes with "hiM", "heR/theM". If the answer ends in m (him, them), the question word ends in m too (whom).

Practice Tips

1. Answer-and-check method: Whenever you see a who/whom question, try answering it. If you naturally say "him" or "them", the question needs whom. If you say "he" or "they", use who.

2. Rearrange the sentence: Turn the question into a statement. "_ did you help?" becomes "You helped _." Since you would say "him" (not "he"), the answer is whom.

3. Spot the preposition: If the blank comes right after a preposition (to, for, with, by, from, about), you almost always need whom.

4. Read formal texts: Pay attention to how newspapers, letters, and textbooks use who and whom. The Straits Times and your English textbook are good sources for correct usage.

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