"who" vs. "whom"

Greetings to all grammarillo supporters out there!

Time for lesson number two. Today we are looking at

"who" vs. "whom"


If you grew up watching Friends (as, I'm ashamed to admit, I did), you surely remember Ross annoying everyone around him by educating them on the correct use of "whom". The truth is that many of us aren't exactly sure about when to use "who" and when to use "whom."

“Whom” is an objective pronoun, same as "him," "her," "it", "us," and "them." It’s used when the pronoun acts as the object of a clause. 

Using “who” or “whom” depends on whether you’re referring to the subject or object of a sentence or subclause. When in doubt, you can substitute “who” with the subjective pronouns “he” or “she,” 
In the same vein, you can also substitute “whom” with the objective pronouns “him” or “her.” Example: I petted a grammarillo whom I came across in a bookshop. I petted him.


“Who” is a subjective or nominative pronoun, same as "he," "she," "it," "we," and "they." In this form, the pronoun acts as the subject of a clause. 


Example: Who loves grammarillos? He loves grammarillos.