Was or Were after If?

English tip:

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."

For instance:
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."

For instance:
If she WAS the one who left her keys there, she will be back.
If I WAS rude to you, I apologize.