When do you use "was" or "were" after "if"?
There’s two scenarios:
1) When you’re writing about a non-true situation, you use "were" after "if" or "wish."
I wish I WERE the king of the world.
If I WERE in charge, I would declare every Friday a public holiday.
If I WERE you, I would finish my homework first.
2) When you are writing about something that could be true, you use "was."
If she WAS the one who left her keys there, she will be back.
If I WAS rude to you, I apologize.