who / whom
There is a test. It takes two seconds and you have never once used it.
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Wrong: Who should I send it to?
Right: Whom should I send it to?
You’d send it to him. Him → whom.
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Wrong: Whom is calling?
Right: Who is calling?
He is calling. He → who.
The test
Rephrase the sentence as an answer using he or him.
- He did it → who
- Send it to him → whom
Him and whom both end in M. That’s the whole mnemonic.
Should you bother
Whom is fading, and in speech “who should I send it to” is completely normal. Nobody sounds wrong saying it.
Two places it still matters: formal writing, and directly after a preposition—to whom, for whom, with whom. To who it may concern is the version that gets noticed.
Getting it wrong in the other direction is worse. Whom deployed where who belongs, to sound careful, is the one that lands badly.
Now go answer with him and see.