‘Now’ changes to ‘then’.
‘Today’ changes to ‘that day’.
‘Yesterday’ turns into ‘the day before’ or ‘the previous day’.
‘Tomorrow’ changes to ‘the next day’ or ‘the following day’.
‘Last week/month/year’ switches to ‘the previous week/month/year’.
‘Next week/month/year’ changes to ‘the following week/month/year’.
‘Here’ turns into ‘there’.