Interrogative Sentence: Types, Word Order, and How to Form Questions

In Spanish, you can turn a statement into a question by changing your voice. Trabajas becomes ¿Trabajas? In Portuguese, Você trabalha becomes Você trabalha? Same words, same order — only the intonation changes.

English does not work this way.

You work does not become a question by raising your voice at the end. It becomes ***Do** you work?* — a new word appears, and the structure of the sentence changes.

That extra word is an auxiliary verb, and understanding how it behaves is the difference between asking questions that sound natural and asking questions that immediately mark you as a learner.

This guide covers the four types of interrogative sentences, the word order rules that govern them, the two situations where the auxiliary disappears, and the errors that speakers of Romance languages make most consistently.

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Contents

1. What is an interrogative sentence?
2. The four types of questions
3. The auxiliary rule
4. Word order in questions
5. Subject questions: the exception
6. Indirect questions: where word order reverses
7. Negative questions and what they really mean
8. Tag questions
9. Intonation: rising and falling
10. Common mistakes for English learners
11. Practice exercises

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1. What Is an Interrogative Sentence?

An interrogative sentence is a sentence that asks a question. It ends with a question mark and typically inverts the normal subject-verb order of English.

English has four sentence types, distinguished by function:

Type	Function	Example
Declarative	States something	She works at the hospital.
Interrogative	Asks something	Does she work at the hospital?
Imperative	Commands or requests	Work at the hospital.
Exclamatory	Expresses strong emotion	She works at the hospital!

The interrogative is the only one of the four that regularly changes word order. That is what makes it structurally the most demanding for learners.

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2. The Four Types of Questions

Yes/No questions

These can be answered with yes or no. They begin with an auxiliary or modal verb.

• Do you speak Portuguese?
• Is she coming to the meeting?
• Have you finished the report?
• Can he drive?

Structure: Auxiliary + Subject + Main verb + (complement)

Wh- questions

These ask for specific information and begin with a question word: who, what, where, when, why, which, whose, how.

• Where do you live?
• What time does the store open?
• Why did she leave early?
• How long have you studied English?

Structure: Wh-word + Auxiliary + Subject + Main verb

These cannot be answered with yes or no. They require information.

Choice questions

These offer two or more options. The answer is contained in the question.

• Would you like tea or coffee?
• Are you coming on Friday or Saturday?
• Do you prefer the blue one or the red one?

Structurally these are yes/no questions with alternatives joined by or. The intonation rises on the first option and falls on the last.

Tag questions

A statement followed by a short question attached at the end. Used to confirm information or invite agreement.

• You're coming, aren't you ?
• She doesn't drive, does she ?
• They've already left, haven't they ?

Covered in detail in section 8.

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3. The Auxiliary Rule

This is the core mechanic of English questions, and the point where most learners' instincts from their first language fail them.

In most English questions, you need an auxiliary verb — a helper that carries the question, the tense, and the person, while the main verb returns to its base form.

Compare:

Statement	Question
You work here.	Do you work here?
She works here.	Does she work here?
They worked yesterday.	Did they work yesterday?

Notice what happens to the main verb. In Does she work here? , the verb is work , not works. In Did they work yesterday? , it's work , not worked.

The auxiliary carries the grammatical information. The main verb goes back to base form. Marking it twice is one of the most common errors:

❌ Does she works here? ❌ Did they worked yesterday? ✅ Does she work here? ✅ Did they work yesterday?

The three auxiliaries

• do / does / did → for present simple and past simple
• be (am, is, are, was, were) → for continuous tenses and the passive
• have / has / had → for perfect tenses

The two exceptions

Exception 1 — the verb to be. When be is the main verb, no auxiliary is needed. The verb itself moves in front of the subject.

• She is a teacher. → ***Is** she a teacher?*
• They were late. → ***Were** they late?*

❌ Do you are ready? ✅ Are you ready?

Exception 2 — modal verbs. Can, could, may, might, must, shall, should, will, would form questions on their own.

• You can swim. → ***Can** you swim?*
• She should leave. → ***Should** she leave?*

❌ Do you can help me? ✅ Can you help me?

There is a third exception, and it deserves its own section.

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4. Word Order in Questions

The standard structure, in order:

(Wh-word) + Auxiliary + Subject + Main verb + (rest of sentence)

Wh-word	Auxiliary	Subject	Main verb	Rest
—	Do	you	speak	Spanish?
Where	do	you	work?
What time	does	the train	leave?
Why	did	she	call	you?
How long	have	they	lived	here?
—	Can	he	drive?

Two things are worth noticing.

The subject always sits between the auxiliary and the main verb. This is the position that speakers of Romance languages tend to get wrong, because in Spanish and Portuguese the subject often moves to the end or disappears entirely.

The wh-word always comes first — before the auxiliary, not after.

❌ Do you where work? ✅ Where do you work?

Prepositions in questions

In natural English, prepositions usually go at the end of the question, not at the beginning.

• Who are you talking to ? (natural)

• To whom are you talking? (correct but very formal)

• What are you looking for ?

• Where are you from?

• Which company do you work for ?

Placing the preposition at the end sounds normal in spoken and written English. The fronted version sounds stiff outside of formal writing.

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5. Subject Questions: The Exception

This is the rule that almost every grammar guide skips, and it causes persistent confusion.

When the question word is the subject of the sentence, there is no auxiliary and no inversion. The question keeps normal statement word order.

Compare these two:

• Who called you? → Who is the subject. Someone called you. No auxiliary.
• Who did you call? → Who is the object. You called someone. Auxiliary required.

More examples of subject questions:

• What happened ? (not What did happen? )
• Who wants coffee? (not Who does want coffee? )
• Which team won ? (not Which team did win? )
• How many people came ? (not How many people did come? )
• What caused the accident?

How to tell the difference

Answer the question and see where the answer goes.

Who called you? → Maria called me. → Maria is the subject. → Subject question. No auxiliary.

Who did you call? → I called Maria. → Maria is the object. → Object question. Auxiliary required.

The shortcut: if the answer to your question would be the subject of the sentence, don't use an auxiliary.

Note that in subject questions the verb takes the third-person -s in present simple, because the wh-word functions as a singular subject: Who wants coffee? not Who want coffee?

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6. Indirect Questions: Where Word Order Reverses

Indirect questions are questions embedded inside another sentence, usually to sound more polite or formal.

And here is the part that surprises nearly every learner: in an indirect question, the word order goes back to statement order, and the auxiliary disappears.

Direct question	Indirect question
Where is the station?	Could you tell me where the station is?
What time does it start?	Do you know what time it starts?
Why did she leave?	I wonder why she left.
Is he coming?	Do you know if he is coming?
How much does it cost?	Could you tell me how much it costs?

Notice what happens: where is the station becomes where the station is. The inversion is undone.

Common introducing phrases

• Could you tell me…
• Do you know…
• I wonder…
• I'd like to know…
• Can you explain…
• Do you have any idea…

For yes/no questions, use if or whether

• Is she available? → Do you know if she is available?
• Did they arrive? → I wonder whether they arrived.

The error to avoid

❌ Do you know where is the bathroom? ✅ Do you know where the bathroom is?

❌ Could you tell me what time does it open? ✅ Could you tell me what time it opens?

This error is extremely common among Spanish and Portuguese speakers, because in those languages the inversion is often preserved in indirect questions. In English it is not.

Punctuation

If the sentence begins with a question phrase ( Do you know… , Could you tell me… ), it takes a question mark. If it begins with a statement ( I wonder… , I'd like to know… ), it takes a period.

• Do you know where she lives? ← question mark
• I wonder where she lives. ← period

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7. Negative Questions and What They Really Mean

A negative question is formed with a negative auxiliary. But it rarely functions as a neutral request for information — it carries an attitude.

Question	What it actually communicates
Don't you like it?	Surprise — I expected you to like it
Isn't she coming?	Surprise or concern — I thought she was
Haven't you finished yet?	Impatience or criticism
Wouldn't it be better to wait?	A suggestion, softened
Isn't this beautiful?	Not a real question — inviting agreement

Using a negative question when you meant a neutral one can sound accusatory. Didn't you send the email? implies the person failed to do something. Did you send the email? is neutral.

Answering negative questions

This is genuinely ambiguous in English, and native speakers avoid short answers here for that reason.

Don't you like coffee?

• Yes= Yes, I do like coffee.
• No= No, I don't like coffee.

The yes or no refers to the fact, not to the negative in the question. When in doubt, answer with a full sentence: No, I don't drink coffee.

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8. Tag Questions

A tag question turns a statement into a question by attaching a short question at the end.

The rule of opposite polarity:

• Positive statement → negative tag: You're coming, aren't you?
• Negative statement → positive tag: You're not coming, are you?

The tag repeats the auxiliary from the main clause. If there is no auxiliary, use do/does/did.

Statement	Tag
She is a doctor,	isn't she?
They aren't ready,	are they?
You work here,	don't you?
He didn't call,	did he?
We've met before,	haven't we?
You can swim,	can't you?

Irregular tags worth memorizing

• I am late, aren't I? (not amn't I )
• Let's go, shall we?
• Open the window, will you?
• Nobody called, did they? ( nobody takes a plural tag)

Intonation changes the meaning

• Falling intonation on the tag → you're confirming something you already believe. You're from Brazil, aren't you? ↘
• Rising intonation on the tag → you're genuinely unsure and asking. You're from Brazil, aren't you? ↗

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9. Intonation: Rising and Falling

Many learners assume all questions rise at the end. In English, they don't.

Yes/No questions → rising intonation ↗ Are you ready? ↗ Did you call her? ↗

Wh- questions → falling intonation ↘ Where do you live? ↘ What time is it? ↘

This surprises most learners, but it matters. A wh- question with rising intonation can sound uncertain, impatient, or like you're asking someone to repeat themselves.

Choice questions → rise on the first option, fall on the last Would you like tea ↗ or coffee? ↘

Statement questions → rising intonation In informal speech, English speakers do sometimes make questions by intonation alone: You're leaving already? ↗ This is common in conversation but should not be used in writing or formal contexts.

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10. Common Mistakes for English Learners

Mistake 1 — Omitting the auxiliary

The most frequent error, and the one that most clearly marks a non-native speaker.

❌ Where you work? ❌ You like pizza? (in formal contexts) ✅ Where do you work? ✅ Do you like pizza?

Why it happens: Spanish and Portuguese form questions by intonation and inversion alone. There is no equivalent of do in those languages, so the instinct to add one doesn't exist.

Mistake 2 — Marking tense twice

❌ What did he said? ❌ Does she works here? ✅ What did he say? ✅ Does she work here?

The auxiliary already carries the tense and person. The main verb stays in base form.

Mistake 3 — Using an auxiliary in subject questions

❌ Who did call you? ❌ What did happen? ✅ Who called you? ✅ What happened?

Mistake 4 — Keeping inversion in indirect questions

❌ Do you know where is the station? ❌ Can you tell me what time does it start? ✅ Do you know where the station is? ✅ Can you tell me what time it starts?

Mistake 5 — Wrong auxiliary with modals and to be

❌ Do you can help me? ❌ Do you are ready? ✅ Can you help me? ✅ Are you ready?

Mistake 6 — Wrong word order with question words

❌ You know what is his name? ❌ When you will arrive? ✅ Do you know what his name is? ✅ When will you arrive?

Mistake 7 — Missing the question mark

Every direct question ends with a question mark, even short ones. In Spanish, questions open with ¿ and close with ?. In English there is no opening mark — only the closing one, and it is mandatory.

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11. Practice Exercises

Exercise 1 — Form the question

Turn each statement into a question.

1. She lives in Miami.
2. They finished the project.
3. He can play the guitar.
4. You are studying English.
5. The class starts at nine.

Answers

1. Does she live in Miami?
2. Did they finish the project?
3. Can he play the guitar?
4. Are you studying English?
5. Does the class start at nine?

Exercise 2 — Subject or object question?

Choose the correct form.

1. Who (called / did call) you last night?
2. Who (you called / did you call) last night?
3. What (happened / did happen) at the meeting?
4. What (you said / did you say) to her?
5. Which team (won / did win) the match?

Answers

1. Who called you last night? (subject question)
2. Who did you call last night? (object question)
3. What happened at the meeting? (subject question)
4. What did you say to her? (object question)
5. Which team won the match? (subject question)

Exercise 3 — Make it indirect

Rewrite each direct question as an indirect question, beginning with the phrase given.

1. Where is the pharmacy? → Could you tell me…
2. What time does the bank close? → Do you know…
3. Why did she resign? → I wonder…
4. Is he coming to the party? → Do you know…
5. How much does this cost? → Could you tell me…

Answers

1. Could you tell me where the pharmacy is?
2. Do you know what time the bank closes?
3. I wonder why she resigned.
4. Do you know if he is coming to the party?
5. Could you tell me how much this costs?

Exercise 4 — Add the tag

Complete each sentence with the correct question tag.

1. You're from Colombia, ______?
2. She doesn't eat meat, ______?
3. They've already arrived, ______?
4. He can't swim, ______?
5. I'm late, ______?

Answers

1. aren't you?
2. does she?
3. haven't they?
4. can he?
5. aren't I?

Exercise 5 — Correct the error

Each sentence contains one mistake. Fix it.

1. Where you live?
2. Does she works on Saturdays?
3. Who did call the police?
4. Do you know where is the exit?
5. Do you can come tomorrow?
6. What did she said?

Answers

1. Where do you live?
2. Does she work on Saturdays?
3. Who called the police?
4. Do you know where the exit is?
5. ***Can** you come tomorrow?*
6. What did she say?

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Frequently Asked Questions

What is an interrogative sentence?

A sentence that asks a question and ends with a question mark. It is one of the four sentence types in English, alongside declarative, imperative, and exclamatory sentences.

What are the four types of interrogative sentences?

Yes/no questions ( Do you speak English? ), wh- questions ( Where do you live? ), choice questions ( Tea or coffee? ), and tag questions ( You're coming, aren't you? ).

Why does English need auxiliary verbs in questions?

Because English lost most of its verb inflection over centuries of language change. Spanish and Portuguese mark person and number in the verb ending, so inversion alone is enough to signal a question. English verb forms are nearly identical across persons, so the auxiliary carries that grammatical work.

When do you not use an auxiliary in a question?

Three situations: when the main verb is to be ( Are you ready? ), when the sentence uses a modal verb ( Can you help? ), and when the question word is the subject ( Who called? ).

What is the difference between a direct and an indirect question?

A direct question uses inverted word order and ends with a question mark: Where is the station? An indirect question is embedded in a larger sentence and returns to statement word order: Could you tell me where the station is?

Do all questions in English have rising intonation?

No. Yes/no questions rise at the end. Wh- questions fall. Using rising intonation on a wh- question can sound uncertain or impatient.

Why is "Who did call you?" wrong?

Because who is the subject of the sentence. Subject questions keep normal word order and take no auxiliary: Who called you? The auxiliary is only needed when the question word is the object: Who did you call?

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References

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Published by Lingua Language Center — ACCET-accredited and SEVP-certified English language school in South Florida, teaching English and foreign languages since 1998. For more free English resources, visit lingua.edu.