Interrogative forms with verb "to have": what have you done...?

We met the two interrogative forms:

  1. simple form: with "to be", and defective verbs, we simply invert the subject and the verb
    you are strong → are you strong?
    Sheila must call her parents → must Sheila call her parents?
    I may sit next to you → may I sit next to you?

  2. general one: with other verbs, using the auxiliary to do
    you feel well → do you feel well?

 

What is the interrogative form with "to have"?

It depends:

  1. when "to have" is the auxiliary verb of the present or past perfect of another verb: we invert the subject and the auxiliary
    you have done your homework → have you done your homework?
    he had taken his pills → had he taken his pills?

  2. when "to have" is a normal verb: we use the general interrogative form with the auxiliary "to do"
    you have a cell phone → do you have a cell phone?
    The simple inversion can also be used with "to have" as a normal verb:
    you have information on this man → have you any information on this man?

 

Case with "to have got":

" to have got" is often used instead of "to have". It has strictly the same meaning.

The above rule applies: in "to have got", "to have" is the auxiliary of the present perfect of "to get", therefore to construct the interrogative form, we simply invert the subject and the auxiliary:
you have got a bathing suit → have you got a bathing suit?