As an example of my grammar training eons ago, I caught myself saying to my husband, “I have two milk chocolates with which to trade,” instead of “I have two milk chocolates to trade you with.”
Ending a sentence with a preposition is not as taboo as it used to be, especially in fiction. You want your characters to sound realistic, and no one says, “To which movie are we going?”
My husband likes to tell the story of Winston Churchill making fun of this rule by saying, “Putting a preposition at the end of a sentence is something up with which we will not put.”
Sometimes we need to break grammar rules, but it helps to know them so you can break them in the right places.
How much of a grammar stickler are you? What grammar mistakes irk you most?