Certainly! Here's a clear explanation of who vs. whom :

Who vs. Whom

1. Who

• Function: Subject of a sentence or clause
• Use: When referring to the person performing the action
• Example:
  • Who is coming to the party? (Who = subject doing the action "coming")
  • She is the one who called you.

2. Whom

• Function: Object of a verb or preposition
• Use: When referring to the person receiving the action or after a preposition
• Example:
  • Whom did you invite? (Whom = object of the verb "invite")
  • To whom should I address the letter? (Whom = object of the preposition "to")

Quick Tip to Decide

• Replace with he/she or him/her:
  • If he/she fits, use who.
  • If him/her fits, use whom.

Example:

• Who/Whom called you?
  • He called you → Who called you?
• You called who/whom?
  • You called him → You called whom?

If you want, I can provide more examples or practice exercises!