Use the verb in a right tense form, подскажите с заданием

1. Well, I don't think I ever (to see) you before.
2. She understood that her father (not to want) to disturb her.
3. I was glad the talk (to turn) on the other subject.
4. David said that he (to ask) the permission from the director the day before.
5. I don't know what (to go) wrong between them.