Earlier today, I was looking for a Star Wars quote on IMDB for a post on Costa Rica Outsider, and I came across this one:
Obi-Wan Kenobi: There was nothing you could have done, Luke, had you been there. You'd have been killed too, and the droids would now be in the hands of the Empire.
But the first thing I thought of was, "Wow! That's a great example of the use of the third conditional!"