Questions and Interrogative Structures

An interrogative is a grammatical structure used to ask a question. English uses several types of questions, each with its own structural patterns.

Yes/No Questions

These normally expect an answer such as yes or no.

Are you ready?
Do you like coffee?
Can she drive?

When an auxiliary verb is already present, it normally comes before the subject:

She is working.
Is she working?

When there is no auxiliary in the simple present or past, English commonly uses do, does, or did:

You like tea.
Do you like tea?

He works here.
Does he work here?

They left early.
Did they leave early?

Wh-Questions

Wh-questions begin with interrogative words such as:

who, whom, whose, what, which, when, where, why, how

Examples:

Where do you live?
Why did she leave?
How did you solve the problem?

Subject Questions

When the question word itself is the subject, auxiliary inversion may not occur:

Who called you?

Here who is the subject.

Compare:

Who did you call?

Here you is the subject and who is the object, so the auxiliary did is required.

This distinction is important because it explains many apparent exceptions to normal question structure.

Alternative Questions

These offer choices:

Would you like tea or coffee?
Are you travelling by car or train?

Tag Questions

A tag question is a short question added to a statement:

You are coming, aren’t you?
She doesn’t know, does she?

Tag questions can seek confirmation, express uncertainty, maintain conversation, or sometimes convey attitude.

Embedded Questions

An embedded question occurs within a larger grammatical structure:

I don’t know where he lives.
Could you tell me what time it is?

Unlike direct questions, embedded questions normally use statement word order:

❌ Do you know where is he?
✓ Do you know where he is?

Understanding interrogative structures is important not only for asking questions but also for reported speech, formal communication, interviews, academic writing, and complex sentence construction.