What is the word order for ‘wh’-questions in English?
Here’s the formula you can use to form a wh-question with an auxiliary verb:
How did he finish his homework so fast?
Remember, an auxiliary verb can be be, have, or do, but it can also be a modal verb like can, should, or would. For example:
wh-question wordauxiliary verbsubject
Where was she working yesterday?
→ Answer: on the 12th floor
→ Answer: to many countries
Why has your brother quit his job?
→ Answer: he got a new job
Where should the couch go?
→ Answer: against the wall
As we saw for yes/no questions, if there is no auxiliary in the sentence, add do as the auxiliary and use the form of the main verb:
The movie begins at 8:00 p.m. | When does the movie begin? |
I canceled my appointment because I’m sick. | Why did you cancel your appointment? |
Even though the auxiliary verb comes before the subject in a wh-question it still agrees with the subject, just as we saw in yes/no questions:
However, there are a couple of tricky types of wh-questions where there are extra steps or options:
When you are asking about a subject.
When the main verb is to be.
When you’re asking about a noun that follows a preposition.
Let’s talk about these tricky cases!
How to ask about the subject of a sentence?
When you are asking about the subject of a sentence the word order will be exactly the same as in the sentence version, except that a wh-word replaces the subject:
My sister can make the dessert. | Who can make the dessert? |
My water was spilling on the floor. | What was spilling on the floor? |
This bag has been forgotten. | Which bag has been forgotten? |
When you are asking about the subject of a sentence, you also don’t need to add the extra auxiliary do. If the sentence version does not have an auxiliary, the question does not have one either!
My brother owns that house. | ✅ Who owns that house? ❌ Who does own that house? |
The black cat likes tuna the most. | ✅ Which cat likes tuna the most? ❌ Which cat does like tuna the most? |
You can still add do for emphasis:
Speaker A:We don't cook for our kids.
Speaker B:Who does cook for your kids?
How to ask a ‘wh-’ question when the main verb is ‘to be’?
When the verb be is the main verb in a wh-question, the verb be appears in the auxiliary position in the question.
The library is across the street. | ✅ Where is the library? ❌ Where does the library is? ❌ Where the library is? |
Their names were Louis and Catherine. | ✅ What were their names? ❌ What did their names were? ❌ What their names were? |
But as we saw above, if you are asking about the subject of a sentence, there is no change in word order:
Bella is the manager. → Who is the manager?
‘Wh-’ questions about the object of a preposition
In English, when you ask about the object of a (e.g. to whom?, of what?, at which intersection?), the preposition is usually “left behind” when the word order changes.
| Who did you give that to? |
I would like a piece of pie. | What would you like a piece of? |
The library is at Main and Campbell. | Which intersection is the library at? |
You can do this with all prepositions and all question words in English.
However, you can also move the preposition to the front of the sentence, along with the wh-word:
At whose house are we having the party?
To whom should I address the letter?
Usually, putting the preposition at the front will sound formal or literary. However, sometimes this is also done to make sure the meaning of a long or complicated question is clear.
Usually, we can use the word who anywhere where you can use whom in English. However, the only case where you cannot use who is directly after the preposition. Compare:
✅ Who did you give that to?
✅ Whom did you give that to?
❌ To who did you give that?
✅ To whom did you give that?
There are a few idioms where the preposition always comes before the wh-word. If it does not, you are not using the idiom:
In what world are you better at math than Albert Einstein?
→ This is not a real question; you are using the set phrase in what world to tell someone that they are not better at math than Albert Einstein.
What world are you better at math than Albert Einstein in?
→ This is a strange, but genuine question.