whom
1
used to ask questions about objects or indirect objects in sentences
- Whom did you invite to the party?
- Whom did she choose as her partner?
- Whom did you see at the store yesterday?
2
used to refer to people in formal English, particularly when they are the object of a verb or preposition
- He is the lawyer whom I consulted for legal advice.
- She is the friend with whom I traveled to Europe last summer.
- He is the doctor whom I visited for my annual check-up.
- He is the professor whom I admire for his knowledge and teaching skills.
3
used to represent the person who receives the action of the verb in the relative clause as the subject or object of verb or preposition
- This is whom you were looking for.
- Whom I met yesterday is a very important man.