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 ...?

Do you know themI want to talk to herPlease,give it to meAre you going with usWhat is matter with him