the boss asked the employee if he / she had already emailed all their clients.
the secretary asked me what my date of birth was. / the secretary asked me what my date of birth is.
sarah wondered whether she would finish the project before the next day's deadline. / sarah wondered whether she would finish the project before the following day's deadline.
the vice-president wanted to know who was attending the meeting. / the vice-president wanted to know who would be attending the meeting the following week.
brian wanted to know from his colleague why he / she had taken two days off.