’Erm… special in what way?’ asked Hermione tentatively.
Harry and Ron exchanged looks as he reached into his bag, withdrew the planner and opened it tentatively.
’Urn… d’you want to get a coffee?’ said Cho tentatively, as the rain began to fall more heavily.
Ignoring her, he tried to catch Fudge’s eye, or Madam Bones’s, wanting to ask whether he was free to go, but Fudge seemed quite determined not to notice Harry, and Madam Bones was busy with her briefcase, so he took a few tentative steps towards the exit and, when nobody called him back, broke into a very fast walk.
’But now?’ said Ron tentatively.
’I saw Cho earlier,’ said Hermione tentatively.
’But you’ve lasted this long —’ Hermione said tentatively.
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’Harry?’ said Hermione tentatively, but he did not want to respond.
’I — er — heard she’s going out with someone else now,’ said Hermione tentatively.
Kreacher doesn’t know…" This is Harry, Kreacher,’ said Herrmone tentatively.
There are no more uses of "tentative" in the book.