Struggling with 'who' and 'whom'? You're not alone! This grammatical gremlin trips up even seasoned writers. The key? Think of 'who' as 'he/she/they' and 'whom' as 'him/her/them'.
'Who' is a subject. Use it when the word is performing the action. Example: 'Who ate all the cookies?' (She ate them).
'Whom' is an object. Use it when the word is receiving the action. Example: 'To whom did you give the cookies?' (You gave them to him).
Still unsure? Try substituting 'he/him' or 'she/her'. If 'he' or 'she' sounds right, use 'who'. If 'him' or 'her' fits, use 'whom'. Practice makes perfect, so don't be afraid to experiment and level up your grammar game!