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WH question words are one of the first things I teach my students when they’re learning to ask questions in English. If you want to move beyond “yes or no” questions and actually get useful information, these nine words are your keys. Each one unlocks a different type of answer — and once you nail the pattern, forming natural questions becomes automatic.
I’ll walk you through all the major WH question words (what, when, where, who, whom, which, why, whose, how), show you exactly when to use each one, teach you the word order trick that trips up learners, and give you a quick quiz to test your skill. By the end, you’ll form WH questions with confidence.
Key Takeaways
- WH words ask for specific information — not yes/no answers, but details about people, places, times, reasons, and methods.
- Each word targets a different answer — “What” for things, “Who” for people (subject), “When” for time, “Where” for place.
- Word order matters: WH + aux verb + subject + main verb — for example, “Where are you going?” not “Where you are going?”
- “Who” vs. “Whom” — subjects vs. objects — “Who came?” (subject) but “Whom did you see?” (object of verb).
- Common mistake: forgetting to invert the subject and verb — this is the #1 error that makes questions sound unnatural.
The Nine Core WH Question Words
Here are the nine question words you’ll use most often in English, with their core meanings and typical contexts:
| WH Word | Meaning / What it asks for | Example question | Typical answer |
|---|---|---|---|
| What | Information about things, ideas, activities | What is your name? | A thing or idea |
| When | Time, date, moment | When did he leave? | A time or date |
| Where | Place or location | Where do they live? | A place |
| Who | Person or people (subject of sentence) | Who opened the door? | A person’s name |
| Whom | Person or people (object of verb) | Whom did you see? | A person’s name |
| Which | Choice between options | Which color do you want? | One from a limited set |
| Why | Reason or cause | Why did you leave? | A reason or explanation |
| Whose | Possession or ownership | Whose are these keys? | A person’s name |
| How | Manner, method, condition, quality | How does this work? | A description of method or state |
Word Order: The Golden Rule
Here’s the mistake I see most often: learners know which WH word to use, but they forget that English question word order is different from statement word order.
WH Question Formula: WH word + auxiliary verb + subject + main verb + object/complement
Example with “where”:
✗ Incorrect: Where she is going?
✓ Correct: Where is she going?
Why: The auxiliary verb “is” must come before the subject “she”.
Example with “what”:
✗ Incorrect: What you did yesterday?
✓ Correct: What did you do yesterday?
Why: The auxiliary verb “did” inverts before the subject “you”.
A useful trick: If you’re unsure about word order, say the sentence as a statement first, then move the WH word to the front and invert the subject and auxiliary verb.
Statement: She is going to the store.
Move WH word + invert: Where is she going?
Understanding the Key Distinctions
Who (subject) vs. Whom (object)
This is one of the trickiest pairs in English, but the rule is simple: who is the subject of the verb; whom is the object (receives the action).
Example 1 (Who = subject): Who opened the door?
Answer: John opened it. “Who” is doing the action.
Example 2 (Whom = object): Whom did you call?
Answer: I called Sarah. “Whom” receives the action of calling.
Quick test: If you can replace the WH word with “he” or “she,” use who. If you’d say “him” or “her,” use whom .
Example: Whom did you meet at the party?
→ “I met him at the party” → use whom . ✓
What vs. Which
Both ask for information, but the key difference is choice . Use which when there are a limited number of options; use what for open-ended questions.
Example with “what”: What color do you like?
(Open-ended — infinite colors possible.)
Example with “which”: Which of these three colors do you like?
(Limited choice — only three options given.)
How vs. How + Adverb combinations
How by itself asks about manner or condition. But you can combine it with other words to ask more specific questions:
- How far — distance: How far is it from here to the station?
- How long — duration or length: How long will you stay?
- How many — countable quantity: How many books do you have?
- How much — uncountable quantity: How much sugar do you need?
- How old — age: How old are you?
Common Mistakes and How to Fix Them
Mistake 1: Forgetting to invert the subject and auxiliary verb
✗ Incorrect: When you are coming?
✓ Correct: When are you coming?
Why: In questions, the auxiliary verb must come before the subject. Always apply this rule.
Mistake 2: Using the wrong WH word for the context
✗ Incorrect: Who time is it?
✓ Correct: What time is it?
Why: You ask about things with “what,” and time is a thing, not a person.
Mistake 3: Confusing “who” and “whom”
✗ Incorrect: Whom went to the party?
✓ Correct: Who went to the party?
Why: “Who went” — the person is the subject, so use “who” (not “whom”).
Sample Dialogue
Teacher: So, Maria, I saw you wrote “Who did you give the book?” — is that correct?
Maria: Yes, isn’t it?
Teacher: Almost. Let me ask you: who is receiving the book? The person or the action?
Maria: Oh, the person is receiving the book.
Teacher: Right. So use “whom” — “Whom did you give the book?” Because “whom” is the object, the receiver.
Maria: Got it. So “who” = person doing the action, “whom” = person receiving the action.
Teacher: Exactly. And remember to always invert the auxiliary verb in questions.
Practice Quiz
Quick Quiz
Choose the correct WH question word for each blank:
- _______ did you go yesterday? (Where / When / What)
- _______ time is your appointment? (Which / What / Where)
- _______ opened the window? (Who / Whom / Which)
- _______ did you call last night? (Who / Whom / What)
- _______ are there so many people here? (Why / Where / How)
Answers: 1. Where · 2. What · 3. Who · 4. Whom · 5. Why
Extended WH Question Combinations
Once you master the core nine, you can extend them with prepositions and other words for more specific questions:
- What for — asking the reason (often used instead of “why”): What did you do that for?
- Whose turn — possession combined with a noun: Whose turn is it?
- Which one — choice with emphasis on a single item: Which one do you prefer?
- Why don’t — making a suggestion: Why don’t we go for a walk?
Related Articles
- ↑ Master Pillar: English Grammar
- ↑ Back to pillar: English Sentence Structure (Pillar)
Frequently Asked Questions
What is the difference between “who” and “whom”?
“Who” is used when the person is the subject (performing the action), while “whom” is used when the person is the object (receiving the action). For example: “Who called you?” (Who is the subject) but “Whom did you call?” (Whom is the object).
Why is word order different in WH questions?
In English, questions require inversion of the subject and auxiliary verb. This happens after you place the WH word at the beginning. For example: “Where are you going?” not “Where you are going?” This inversion is a fundamental rule of English question formation.
When should I use “which” instead of “what”?
Use “which” when you’re asking someone to choose from a limited set of options. Use “what” for open-ended questions. For example: “What is your favorite color?” (any color) but “Which of these three colors do you like?” (choose from three).
How do I remember all nine WH question words?
Think of what each word targets: “Who” and “Whom” = people, “When” = time, “Where” = place, “What” = things/ideas, “Which” = choice, “Why” = reason, “Whose” = possession, “How” = manner/condition. Creating example sentences for each helps cement the differences in your memory.
Is “whom” still used in modern English?
Technically yes, “whom” is the grammatically correct form for object positions, but it’s becoming rare in casual speech and writing. However, in formal writing, professional communication, and exams, using “whom” correctly is important. Many learners avoid it, but knowing the rule shows advanced proficiency.
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