Which one is correct?

A. Who did you speak to?
B. Whom did you speak to?
C. Whom did you speak?

Thanks in advance.

Sehen Sie eine Übersetzung

Who did you speak to?

Technically, "Whom did you speak to?" and "To whom did you speak?" are correct, but no one says it that way.

Who vs Whom

“Who” (and “whoever”) is the subject case, and “whom” (and “whomever”) is the object case.
The subject case means I, he, she, it, we, you, they, who.
The object case means me, him, her, it, us, you, them, whom.

For example:

– *Who* is going to the party? *He* is going to the party.
– *Whom* is he going to the party with? He is going to the party with *her*.
– The doctor *who* called you yesterday is here to see you. (The doctor called you. *He* called you. The doctor *who* called you.)
– The doctor, *whom* you called yesterday, is here to see you. (You called the doctor. You called *him*. The doctor *whom* you called.)

HOWEVER

The word “whom” is disappearing from English. It sounds normal to say “who” for both the subject and the object.

– Who is going to the party? He is going to the party.
– Who is he going to the party with? He is going to the party with her.
– The doctor who called you yesterday is here to see you. (The doctor called you.)
– The doctor, who you called yesterday, is here to see you. (You called the doctor.)

But you MUST use “whom” after a preposition.

– *With whom* is he going to the party? He is going to the party *with her*.
– The doctor *with whom* you spoke yesterday is on the phone. He wants to talk to you.

about whom, at whom, by whom, for whom, from whom, of whom, to whom, with whom, etc.