Point 65 in the category of PAST is past perfect simple QUESTIONS.
iWeb corpus was not offering information for this pattern, but COCA did offer something basic. One thing is for sure. This is quite a rare structure.
had _p _vvn ?
1 HAD SHE DONE ? 44
2 HAD HE DONE ? 35
3 HAD I DONE ? 25
4 HAD IT BEEN ? 25
5 HAD HE GONE ? 20
6 HAD HE BEEN ? 15
HAD SHE EXPECTED?
New York TimesHad she expected Janelle to offer to give her a massage? It was so silly of her. Had Janelle meant anything more by “warm bath”?
Jul 3, 2016
8 HAD HE SAID ? 14
9 HAD SHE GONE ? 13
10 HAD HE EXPECTED ? 12
1 HAD SHE BEEN THINKING ? 23
2 HAD HE BEEN THINKING ? 18
3 HAD HE DONE IT ? 14
4 HAD HE COME FROM ? 12
5 HAD HE BEEN THERE ? 9