• Who?
  We ask questions about people, ex:
            Who’s that? My Friend Damon.

•  What?  

        We ask question about things, animals and actions, ex:

                  What’s your favorite sport? Basketball.

• Where….. From?

        We ask questions about places.

                   Where are you from? I’m from Italia.

• Whose
  We ask questions about possession.
              Whose sweater is green? Jane’s. 

• How old?
  We ask questions about ages.
              How old are you?  I’m twenty-four.