Okay, here's my sentence: "He gathered himself together to make sure he had a look of great calm and poise to whoever it might be." I want to say "whomever", but according to the rule I was reading, it goes: he + him = whoever, and him + him = whomever. Plus, Microsoft Word kept marking it off as incorrect during grammar and spell check. Any clarification would be much appreciated. The rules somewhat make sense to me, but I'm hoping someone can dumb it down for me.