Questions with Prepositions
1. When a question word is the object of a preposition, the preposition usually comes at the end of the clause, especially in an informal style. That is why we often put a preposition (WITH, AT, FOR, etc.) at the end of a question with WHO...? or WHAT...?, especially in spoken English.
Examples:
a.
Who did you go WITH? (more natural than "With whom did you go?")
b.
Who is that letter FOR?
c.
What are you looking AT?
d. What is she talking ABOUT?
★ MORE GENERAL EXAMPLES ★
-- What are you looking FOR?
-- Who did Anne send the money TO?
-- Where is your wife FROM?
-- What's your book ABOUT?
-- Who are you in love WITH now?
-- What are you all waiting FOR?
-- Who did you give your cell number TO?
