The mnemonic I got in school was that if you can answer with "him" then it should be "whom."
Who made this? He made this.
Whom do you trust? I trust him.
This mnemonic is predicated on answering in complete proper sentences. I realize that in current colloquial English, "Who made this? Him." is certainly an exchange one might encounter.
Who made this? He made this. Whom do you trust? I trust him.
This mnemonic is predicated on answering in complete proper sentences. I realize that in current colloquial English, "Who made this? Him." is certainly an exchange one might encounter.