J-Questions

Are there 3 doctors next door?   Yes, and they don't have wives...:)

So you understand that words change their position every time you are making a question. Sometimes, however, they change in different ways.

So the Negative of  Is there a doctor here? would be: Is there not a doctor here? Why a negative at all? Well, if someone tells you there are only 2 doctors next door. You might want to know for sure if there are 2 or 3. Then you would say:
Are there not 3 doctors next door?

And if you wanted a contraction of that -- with Aren't , what do you do with "there"? You can't just leave "there" out of the sentence. So you stick it in after Aren't.
Aren't there 3 doctors?
OR Are there not 3 doctors?

You really have to love grammar music!

Now, in addition to "Wh" questions like:
Why are there only 2 doctors? Notice in these you just add the Wh word to the front of the  Are there 2 doctors? question. But -- too bad -- it does not stay that easy.

Try this one and, after you get it, we will talk about how it works. You may have to guess a little, but let's see how you do:
doctors many there how are is much doctor
 ____ ____ ____ ____ _____?