When in Doubt! - Who vs. Whom

I can't remember if I've posted this before, but I am absolutely in love with this trick!

"When in doubt, try this simple trick: If you can replace the word with “he”' or “'she,” use who. If you can replace it with “him” or “her,” use whom" (Grammarly 2018).

Read the full article below: 

Who or Whom? It's Not As Hard As You Think | Grammarly

References:
"Who vs. Whom." How British English and American English Are Different | Grammarly Blog. March 06, 2018. Accessed August 13, 2018. https://www.grammarly.com/blog/who-vs-whom-its-not-as-complicated-as-you-might-think/.