Употребите верно личные местоимения в косвенном падеже (me/us/him/her/ them/it).
I don't know Sarah's parents. Do you know ...?
Where is Ann? I want to talk to ....
I want that book. Please, give it to ....
We're going to the conference. Are you going with ...?
Steve is gloomy today. What is the matter with ...?