Third Conditional
I woke up late. I was fired because of that.
If I had woken up earlier, I wouldn't have been fired. // If I hadn't woken up late, I wouldn't have been fired.
I didn't cook lunch. I spent a lot of money on food.
If I had cooked my lunch, I wouldn't have spent a lot of money on food.
I went to the party last night. I saw my ex.
If I hadn't gone to the party, I wouldn't have seen my ex.