Question Words in English: Who, What, When, Where, Why, and How

Question words help speakers request specific information. "Who" asks about a person, "where" asks about a place, and "why" asks about a reason. The choice of word is only the first step. English questions also require the correct auxiliary verb and word order.

This guide explains the major question words, "how" combinations, subject questions, prepositions, and indirect questions. Each section uses clear patterns so you can create questions rather than memorize a fixed list. For additional practice, see daily English conversation and sentence structure.

What Are Question Words?

Question words usually request an open answer rather than "yes" or "no." The main set is:

• "who" for a person
• "what" for a thing, action, or idea
• "when" for a time
• "where" for a place
• "why" for a reason
• "which" for a choice from a limited set
• "whose" for possession
• "whom" for a person as an object in formal English
• "how" for method, condition, degree, or measurement

These are often called "WH-words," although "how" begins with "h."

Basic Question Word Order

The common pattern is:

question word + auxiliary + subject + main verb

• "Where do you live?"
• "What did she study?"
• "Why are they waiting?"
• "When has the schedule changed?"
• "How can I apply?"

The auxiliary carries tense and agrees with the subject. The main verb normally stays in its base form after "do," "does," or "did":

• Correct: "Where did she go?"
• Incorrect: "Where did she went?"

If "be" is the main verb, move it before the subject:

• "Where is the classroom?"
• "Why were they late?"

"Who" for People

"Who" asks about a person:

• "Who is your teacher?"
• "Who did you meet at the activity?"
• "Who can answer the question?"

The grammar changes when "who" is the subject. In "Who called you?" the unknown person performed the action. Do not add "did."

When "who" is the object, use the normal auxiliary pattern:

• "Who did you call?"

Compare:

• Subject question: "Who helped Maya?"
• Object question: "Who did Maya help?"

The position of the known noun reveals the difference.

"What" for Things, Actions, and Ideas

"What" has several broad uses:

• Identity: "What is this?"
• Action: "What are you doing?"
• Information: "What did the teacher explain?"
• Type: "What kind of music do you like?"
• Time: "What time does class begin?"

"What" can also come before a noun:

• "What program are you taking?"
• "What language does she speak?"

At Columbia West College (CWC), 86.2% of surveyed students said speaking was the skill they most wanted to improve. English Speaking Success was developed in response to that need. Question words are central to speaking practice because open questions invite learners to explain experiences, opinions, and plans rather than give only a short yes-or-no answer.

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"When" for Time

"When" asks for a time, date, period, or stage:

• "When does the office open?"
• "When did you arrive in Los Angeles?"
• "When will the activity end?"

Use "what time" when you expect a clock time:

• "What time does class begin?" — "At 9:00."

Use "when" for a broader answer:

• "When does the next session begin?" — "In August."

"When" also introduces a time clause in a statement: "Call me when you arrive." That is not a question, so it does not use question word order.

"Where" for Place

"Where" asks about location, origin, or destination:

• "Where is the school?"
• "Where are you from?"
• "Where did the group go?"
• "Where should I submit the form?"

Avoid adding an unnecessary preposition when "where" already expresses place:

• Unnatural in standard edited English: "Where are you going to?"
• Natural: "Where are you going?"

Some dialects and conversational contexts allow a final "at," as in "Where are you at?" Learners should use the shorter standard form in formal writing.

"Why" for Reasons

"Why" asks for a reason or purpose:

• "Why are you studying English?"
• "Why did the class end early?"
• "Why should we revise this sentence?"

Answers often begin with "because":

• "Why are you studying English?"
• "Because I want to communicate at work."

In complete formal writing, include the main clause: "I am studying English because I want to communicate at work." A short "because" answer is natural in conversation.

"Why not?" can suggest an action or ask why an action is impossible:

• "Why not practice together?"
• "Why can't we meet tomorrow?"

"Which" for Limited Choices

"Which" asks the listener to choose from a known or limited set:

• "Which class are you taking, morning or evening?"
• "Which route is faster?"
• "Which of these examples is correct?"

"What" is broader:

• "What language do you want to learn?" The possible set is open.
• "Which language do you want to study, English or Spanish?" The choices are stated.

In everyday use, "what" and "which" sometimes overlap. The size and visibility of the choice set guide the most natural option.

"Whose" for Possession

"Whose" asks who owns or is associated with something:

• "Whose notebook is this?"
• "Whose turn is it?"
• "Whose presentation did you watch?"

Do not confuse "whose" with "who's." "Who's" is the contraction of "who is" or "who has":

• "Who's your teacher?" = "Who is your teacher?"
• "Whose book is this?" = Who owns the book?

Use the expansion test. If "who is" or "who has" fits, use the apostrophe.

"Whom" in Formal English

"Whom" is the object form of "who":

• Formal: "Whom did you contact?"
• Common: "Who did you contact?"

After a fronted preposition, "whom" remains common in formal writing:

• "To whom should I send the form?"

Conversational English usually places the preposition at the end and uses "who":

• "Who should I send the form to?"

Both structures can be correct. Choose the one that fits the register. The guide to pronouns in English explains subject and object forms more broadly.

"How" for Method and Condition

"How" asks about method, manner, or condition:

• "How do you get to school?"
• "How did you learn that expression?"
• "How are you?"
• "How was the activity?"

The expected answer determines the meaning. "How do you get to school?" may be answered with "By Metro." "How was the activity?" asks for an evaluation, such as "It was enjoyable."

Common "How" Combinations

"How" combines with adjectives and adverbs to request measurements:

• "how many" for countable nouns: "How many classes do you have?"
• "how much" for uncountable amounts or price: "How much time do we have?"
• "how long" for duration or length: "How long have you lived here?"
• "how often" for frequency: "How often do you practice?"
• "how far" for distance: "How far is the station?"
• "how old" for age: "How old is the building?"
• "how soon" for time until an event: "How soon can you begin?"
• "how well" for degree of ability: "How well do you understand the lesson?"

Match the noun type carefully. Say "How many assignments?" but "How much homework?"

Questions with Prepositions

In natural conversation, a preposition often appears at the end:

• "Who are you talking to?"
• "What are you looking for?"
• "Which class did she sign up for?"

Formal writing may place the preposition first:

• "To whom are you speaking?"
• "For what are you looking?" This form is grammatical but unusually formal.

Do not remove a preposition that belongs to the verb expression. "What are you looking?" has a different or incomplete meaning from "What are you looking for?"

Indirect Questions

An indirect question places the information request inside a larger sentence:

• Direct: "Where is the classroom?"

• Indirect: "Could you tell me where the classroom is?"

• Direct: "When does class begin?"

• Indirect: "Do you know when class begins?"

The embedded question uses statement word order. Do not invert the subject and verb:

• Incorrect: "Could you tell me where is the classroom?"
• Correct: "Could you tell me where the classroom is?"

Indirect questions often sound more polite. The guide to reported speech includes related patterns for reported questions.

Common Question Word Mistakes

Do not add "do" to a subject question:

• Incorrect: "Who did call you?"
• Correct: "Who called you?"

Do not keep past tense on the main verb after "did":

• Incorrect: "Where did she went?"
• Correct: "Where did she go?"

Do not use question order inside an indirect question:

• Incorrect: "Do you know where does he live?"
• Correct: "Do you know where he lives?"

Do not confuse "how long" with "how far." "How long" asks about time or length. "How far" asks about distance.

How to Practice Question Words

Choose one familiar topic, such as school, work, food, or Los Angeles. Write one question with each major word. Then answer each question in a complete sentence.

Next, transform statements into information questions:

• Statement: "Mina visited MOCA on Tuesday."
• Person: "Who visited MOCA?"
• Place: "Where did Mina go?"
• Time: "When did Mina visit MOCA?"

Finally, practice follow-up questions. If a partner says, "I went to the beach," ask "When did you go?" "Who did you go with?" and "How was the weather?" This creates a real information exchange.

Frequently Asked Questions

What are the 7 main question words?

The most common are "who," "what," "when," "where," "why," "which," and "how." "Whose" and "whom" are also important.

Why does a subject question not use "do"?

The question word itself fills the subject position, so English does not add "do," "does," or "did." Say "Who called?"

What is the difference between "what" and "which"?

"What" usually asks from an open set. "Which" usually asks for a choice from a known or limited set.

Is "whom" still used?

Yes, especially after a fronted preposition and in formal writing. In everyday conversation, "who" is common in object position.

Why does an indirect question use statement order?

The embedded question functions as part of a larger clause. Say "Do you know where she lives?" rather than "where does she live."

Strong questions create longer, more meaningful conversations. CWC developed English Speaking Success after 86.2% of surveyed students identified speaking as the skill they most wanted to improve. Contact CWC to learn about daily speaking practice in Los Angeles.