A man goes to Boston on a business trip. He hopes that he will be able to discharge his business obligations in time to allow for a little sightseeing, a little restaurant-hopping.
As it happens, however, business concerns occupy him his entire trip. He is in meetings from early in the morning until late at night, every day. He barely has a chance to grab sandwiches and some fruit in between.
By the end of his stay he has been able to see none of Boston. In the cab to airport he watches as the sights whiz by. Thinking of all the things he'd hoped to do he leans forward and wistfully asks the cabby, "For future reference, where could I have gotten scrod?".
The cabby brings the car to an abrupt halt, looks back at the man, and says "Buddy, I've heard that question a million times but that's the first time I've heard it in the pluperfect subjunctive!"