I am not the world's greatest expert on the technical analysis of conditional statements, but FWIW here are my thoughts. "Were" here is not the past tense, if that's what your message title is referring to. It's a subjunctive.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
AnonymousIf I were waiting there next week when he gets off the plane, he would be totally surprised.
What is the difference between this and "If you were going to *** Museum tomorrow"??