"Whom" is an object pronoun, used as the object of a verb or a preposition.
"Who", on the other hand, is a subject pronoun, used as the subject of a sentence or a clause.
The pronouns 'who' and 'whom' are interrogative pronouns and relative pronouns.
Examples as interrogative pronouns:
Who is our physics teacher? (subject of the sentence)
To whom should I give my completed application? (object of the preposition 'to')
Examples as relative pronouns:
Mr. Fish who taught chemistry is teaching physics. (subject of the relative clause)
The one to whom you give your application is the manager. (object of the preposition 'to', the prepositional phrase introduces the relative clause)
Juliet
Properly we say Whom is this for, and we certainly write it that way, but in informal speech "who" is allowed instead when it is the first word in the sentence.
Use the he/him method to decide which word is correct. he = who him = whom Examples: Who/Whom wrote the letter? He wrote the letter. Therefore, "who" is correct. For who/whom should I vote? Should I vote for him? Therefore, "whom" is correct. We all know who/whom pulled that prank. This sentence contains two clauses: We all know and who/whom pulled that prank. We are interested in the second clause because it contains the who/whom. He pulled that prank. Therefore, "who" is correct.
You put in your address and instead of saying "Dear sir," you would say, "To whom it may concern"
Whom is a pronoun. Whois used as the subject of a verb (who decided this?) and whom is used as the object of a verb or preposition (to whom do you wish to speak?). However, in modern English who is often used instead of whom, as in who should we support? and most people consider this to be acceptable. Origin: Old English hwā .
The villain, deceiver, manipulator, servant of Othello (whom he hates because he made Cassio his lieutenant instead of him).
Keep your arms at at your sides when boxing out instead of pushing and shoving opponents and referees confused at whom to call a foul on.
Perfectly correct: there is no requirement that you must use "who"/"whom" for a person and "that" only for objects and non-human animals. It is fine to say, for example, "All the people that were in the vicinity at the time of the shooting claimed not to have seen it," or "You are the only one that would think such a thing."
D.O. is what or whom I.O. is to whom or for whom
Technically the phrase "Whom is this for" is the grammatically correct version of this statement, but in modernized English there are a fair amount of people who don't know the difference between "who," and "whom." So in a casual situation, or when talking informally, the phrase "Who is this for" is acceptable--enough, but not only do you sound more intelligent when you use the word "whom" correctly, but also it's the correct way of using the language. Simply, it is not technically correct, but in a casual situation, it is acceptable.
Give the letter to Mary. to whom?The letter is for Mary. for whom?
I think most grammar books will tell you whom is more or less obsolete as a relative pronoun. Both who and that are ok for people except if you refer to a name:He is the guy that I met at the restaurant.I spoke to Jon, who owns the taxi.