This questionnaire is based on a myriad of books I've read on novel/screenplay structure. I'm no expert; I've written some books, read a lot of books, and now I've pulled out what I think are the most useful tidbits for my own process.
It assumes a three-act, hero's journey structure. Nothing fancy. It contains about 50 questions.
It will ask you about key plot points, including: Opening, Catalyst, Inciting Event, Mid-Point, Low-Point, Climax, Closing.
If you're writing a romance, your "Opponent" is probably the love interest character.