Hadn’t is defined as a contraction of had not.
An example of hadn’t is when you overeat and say, “I wish I hadn’t eaten that third slice of pie.”
- Hadn't they talked enough?
- He hadn't said anything to his father.
- If Dulce hadn't chased him so hard, would he have fallen in love with her?
- Why hadn't she realized what wonderful parents she had while they were still alive?
- Why hadn't it occurred to her that Jonathan might feel he was being replaced?