Can somebody please help me understand the whole timeline thing when it comes to choosing verb tenses?
Today, I asked a friend if he wanted anything because I was going to Starbucks for lunch. He said no, so I came back empty handed, but he was like, "I didn't know you were going to go to Starbucks for real!"
I replied with the following:
I wouldn't have asked if i weren't planning on going.
But it feels like I should have said one of the following:
I wouldn't have asked if I didn't plan on going.
I wouldn't have asked if i wasn't planning on going.
I wouldn't have asked if i hadn't planned on going.
How would a native speaker decide to put these "events" on a timeline and choose verb tenses?